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Hurley N, Bhandari B, Kamau S, Gonzalez Rodriguez R, Squires B, Kaul AB, Cui J, Lin Y. Selective CW Laser Synthesis of MoS 2 and Mixture of MoS 2 and MoO 2 from (NH 4) 2MoS 4 Film. Micromachines (Basel) 2024; 15:258. [PMID: 38398986 PMCID: PMC10892590 DOI: 10.3390/mi15020258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/04/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024]
Abstract
Very recently, the synthesis of 2D MoS2 and WS2 through pulsed laser-directed thermolysis can achieve wafer-scale and large-area structures, in ambient conditions. In this paper, we report the synthesis of MoS2 and MoS2 oxides from (NH4)2MoS4 film using a visible continuous-wave (CW) laser at 532 nm, instead of the infrared pulsed laser for the laser-directed thermolysis. The (NH4)2MoS4 film is prepared by dissolving its crystal powder in DI water, sonicating the solution, and dip-coating onto a glass slide. We observed a laser intensity threshold for the laser synthesis of MoS2, however, it occurred in a narrow laser intensity range. Above that range, a mixture of MoS2 and MoO2 is formed, which can be used for a memristor device, as demonstrated by other research groups. We did not observe a mixture of MoS2 and MoO3 in the laser thermolysis of (NH4)2MoS4. The laser synthesis of MoS2 in a line pattern is also achieved through laser scanning. Due to of the ease of CW beam steering and the fine control of laser intensities, this study can lead toward the CW laser-directed thermolysis of (NH4)2MoS4 film for the fast, non-vacuum, patternable, and wafer-scale synthesis of 2D MoS2.
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Affiliation(s)
- Noah Hurley
- Department of Physics, University of North Texas, Denton, TX 76203, USA; (N.H.); (B.B.); (S.K.); (R.G.R.); (B.S.); (J.C.)
| | - Bhojraj Bhandari
- Department of Physics, University of North Texas, Denton, TX 76203, USA; (N.H.); (B.B.); (S.K.); (R.G.R.); (B.S.); (J.C.)
| | - Steve Kamau
- Department of Physics, University of North Texas, Denton, TX 76203, USA; (N.H.); (B.B.); (S.K.); (R.G.R.); (B.S.); (J.C.)
| | - Roberto Gonzalez Rodriguez
- Department of Physics, University of North Texas, Denton, TX 76203, USA; (N.H.); (B.B.); (S.K.); (R.G.R.); (B.S.); (J.C.)
| | - Brian Squires
- Department of Physics, University of North Texas, Denton, TX 76203, USA; (N.H.); (B.B.); (S.K.); (R.G.R.); (B.S.); (J.C.)
| | - Anupama B. Kaul
- Department of Materials Science and Engineering, University of North Texas, Denton, TX 76203, USA;
- Department of Electrical Engineering, University of North Texas, Denton, TX 76203, USA
| | - Jingbiao Cui
- Department of Physics, University of North Texas, Denton, TX 76203, USA; (N.H.); (B.B.); (S.K.); (R.G.R.); (B.S.); (J.C.)
| | - Yuankun Lin
- Department of Physics, University of North Texas, Denton, TX 76203, USA; (N.H.); (B.B.); (S.K.); (R.G.R.); (B.S.); (J.C.)
- Department of Electrical Engineering, University of North Texas, Denton, TX 76203, USA
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2
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Zhi X, Li X, Yuan S, Wang D, Wang K. Influence of Thermal Annealing on Mechanical and Optical Property of SiO 2 Film Produced by ALD. Materials (Basel) 2024; 17:470. [PMID: 38276409 PMCID: PMC10817477 DOI: 10.3390/ma17020470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/12/2024] [Accepted: 01/16/2024] [Indexed: 01/27/2024]
Abstract
The application range of fused silica optical components can be expanded and the cost of fused silica components can be reduced by depositing the same material film on fused silica substrate. However, due to the different manufacturing process, the performance of ALD SiO2 film is lower than that of fused silica substrate, which also limits the use of this process. In this paper, ALD SiO2 film with different thicknesses were deposited, and then the structure and properties were tested. Finally, the ALD SiO2 film was treated via the annealing process. Transmission electron microscopy (TEM) showed that the ALD SiO2 film had good compactness and substrate adhesion. The Raman spectra showed that the ALD SiO2 film and substrate had the same structure, with only slight differences. The XRD pattern showed that ALD-fused silica did not crystallize before or after annealing. The infrared spectra showed that there was an obvious Si-OH defect in the ALD SiO2 film. The laser damage showed that the ALD SiO2 film had a much lower damage threshold than the fused silica substrate. The nanoindentation showed that the mechanical properties of the ALD SiO2 film were much lower than those of the fused silica substrate. After a low-temperature annealing treatment, the ALD SiO2 film Si-OH defect was reduced, the ALD SiO2 film four-member ring content was increased, the elastic modulus of the ALD SiO2 film was increased from 45.025 GPa to 68.025 GPa, the hardness was increased from 5.240 GPa to 9.528 GPa, and the ALD SiO2 film damage threshold was decreased from 5.5 J/cm2 to 1.3 J/cm2.
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Affiliation(s)
- Xintao Zhi
- School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; (X.Z.); (S.Y.); (D.W.)
| | - Xiaopeng Li
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Songmei Yuan
- School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; (X.Z.); (S.Y.); (D.W.)
| | - Dasen Wang
- School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; (X.Z.); (S.Y.); (D.W.)
| | - Kehong Wang
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
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3
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Velazquez-Albino AC, Nozka A, Melnyk A, Good HJ, Rinaldi-Ramos CM. Post-synthesis Oxidation of Superparamagnetic Iron Oxide Nanoparticles to Enhance Magnetic Particle Imaging Performance. ACS Appl Nano Mater 2024; 7:279-291. [PMID: 38606282 PMCID: PMC11008578 DOI: 10.1021/acsanm.3c04442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
This study investigates the impact of post-synthesis oxidation on the performance of superparamagnetic iron oxide nanoparticles (SPIONs) in magnetic particle imaging (MPI), an emerging technology with applications in diagnostic imaging and theranostics. SPIONs synthesized from iron oleate were subjected to a post-synthesis oxidation treatment with a 1% Oxygen in Argon mixture. MPI performance, gauged via signal intensity and resolution using a MOMENTUM™ scanner, was correlated to the nanoparticles' physical and magnetic properties. Post-synthesis oxidation did not alter physical attributes like size and shape, but significantly enhanced magnetic properties. Saturation magnetization increased from 52% to 93% of the bulk value for magnetite, leading to better MPI performance in terms of signal intensity and resolution. However, the observed MPI performance did not fully align with predictions based on the ideal Langevin model, indicating the need for considering factors like relaxation and shape anisotropy. The findings underscore the potential of post-synthesis oxidation as a method to fine-tune magnetic properties of SPIONs and improve MPI performance, and the need for reproducible synthesis methods that afford finely tuned control of nanoparticle size, shape, and magnetic properties.
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Affiliation(s)
| | - Aniela Nozka
- Department of Bioengineering, Clemson University, Clemson, SC 29634
| | - Andrii Melnyk
- Department of Chemical Engineering, University of Florida, Gainesville, FL 32611
| | - Hayden J Good
- Department of Chemical Engineering, University of Florida, Gainesville, FL 32611
| | - Carlos M Rinaldi-Ramos
- Department of Chemical Engineering, University of Florida, Gainesville, FL 32611
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611-6131
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4
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Fedorov AY, Bukhtiyarov AV, Panafidin MA, Prosvirin IP, Zubavichus YV, Bukhtiyarov VI. Thermally Induced Surface Structure and Morphology Evolution in Bimetallic Pt-Au/HOPG Nanoparticles as Probed Using XPS and STM. Nanomaterials (Basel) 2023; 14:57. [PMID: 38202512 PMCID: PMC10780797 DOI: 10.3390/nano14010057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/18/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024]
Abstract
Bimetallic nanoparticles expand the possibilities of catalyst design, providing an extra degree of freedom for tailoring the catalyst structure in comparison to purely monometallic systems. The distribution mode of two metal species defines the structure of surface catalytic sites, and current research efforts are focused on the development of methods for their controlled tuning. In light of this, a comprehensive investigation of the factors which influence the changes in the morphology of bimetallic nanoparticles, including the elemental redistribution, are mandatory for each particular bimetallic system. Here we present the combined XPS/STM study of the surface structure and morphology of bimetallic Pt-Au/HOPG nanoparticles prepared by thermal vacuum deposition and show that thermal annealing up to 350 °C induces the alloying process between the two bulk-immiscible metal components. Increasing the treatment temperature enhances the extent of Pt-Au alloying. However, the sintering of nanoparticles starts to occur above 500 °C. The approach implemented in this work includes the theoretical simulation of XPS signal intensities for a more meticulous analysis of the compositional distribution and can be helpful from a methodological perspective for other XPS/STM studies of bimetallic nanoparticles on planar supports.
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Affiliation(s)
| | - Andrey V. Bukhtiyarov
- Boreskov Institute of Catalysis SB RAS, Novosibirsk 630090, Russia (M.A.P.); (I.P.P.); (Y.V.Z.); (V.I.B.)
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5
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Xi Z, Yan S, Liu Z, Yang L, Zhang M, Guo Y, Tang W. Tunable Ga2O3 solar-blind photosensing performance via thermal reorder engineering and energy-band modulation. Nanotechnology 2023. [PMID: 38029450 DOI: 10.1088/1361-6528/ad10e3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
As an ultra-wide bandgap semiconductor, gallium oxide (Ga2O3) has been extensively applied in solar-blind photodetectors owing to the absorbance cut-off wavelength of shorter than 280 nm, and the optimized technologies of detection performance is seriously essential for its further usages. Herein, a feasible thermal reorder engineering method was performed through annealing Ga2O3 films in vacuum, O2 and oxygen plasma atmospheres, realizing to tune solar-blind photosensing performance of Ga2O3 photodetectors. Thermal treatment, in fact a crystal reorder process, significantly suppressed the noise in Ga2O3-based photodetectors and enhanced the photo-sensitivity, with the dark current decreasing from 154.63 pA to 269 fA and photo-to-dark current ratio magically raising from 288 to 2.85×104. This achievement is dependent of energy-band modulation in Ga2O3 semiconductor, that is certified by first-principles calculation. Additionally, annealing in oxygen atmospheres notably reduces the concentration of oxygen vacancies in the surface of films, thereby improving the performance of the photodetectors; the oxygen vacancy is extremely concerned in oxide semiconductors in the view of physics of surface defects. In all, this work could display a promising guidance for modulating the performance of photodetectors based on wide bandgap oxide semiconductor, especially for hot Ga2O3 issue.
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Affiliation(s)
- Zhaoying Xi
- Nanjing University of Posts and Telecommunications, No.9, Wenyuan Road, Yadong New District, Nanjing, Nanjing, 210003, CHINA
| | - Sihan Yan
- Nanjing University of Posts and Telecommunications, No.9, Wenyuan Road, Yadong New District, Nanjing, Nanjing, 210003, CHINA
| | - Zeng Liu
- Nanjing University of Posts and Telecommunications, No.9, Wenyuan Road, Yadong New District, Nanjing, Nanjing, 210003, CHINA
| | - Lili Yang
- Nanjing University of Posts and Telecommunications, No.9, Wenyuan Road, Yadong New District, Nanjing, Nanjing, 210003, CHINA
| | - Maolin Zhang
- Nanjing University of Posts and Telecommunications, 9, , 210003, CHINA
| | - Yufeng Guo
- Nanjing University of Posts and Telecommunications, No.9, Wenyuan Road, Yadong New District, Nanjing, Nanjing, 210003, CHINA
| | - Weihua Tang
- Nanjing University of Posts and Telecommunications, No.9, Wenyuan Road, Yadong New District, Nanjing, Nanjing, 210003, CHINA
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6
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Chen S, Al-Hilfi SH, Chen G, Zhang H, Zheng W, Virgilio LD, Geuchies JJ, Wang J, Feng X, Riedinger A, Bonn M, Wang HI. Tuning the Inter-Nanoplatelet Distance and Coupling Strength by Thermally Induced Ligand Decomposition. Small 2023:e2308951. [PMID: 38010120 DOI: 10.1002/smll.202308951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Indexed: 11/29/2023]
Abstract
CdSe nanoplatelets (NPLs) are promising 2D semiconductors for optoelectronic applications, in which efficient charge transport properties are desirable. It is reported that thermal annealing constitutes an effective strategy to control the optical absorption and electrical properties of CdSe NPLs by tuning the inter-NPL distance. Combining optical absorption, transmission electron microscopy, and thermogravimetric analysis, it is revealed that the thermal decomposition of ligands (e.g., cadmium myristate) governs the inter-NPL distance and thus the inter-NPL electronic coupling strength. Employing ultrafast terahertz spectroscopy, it is shown that this enhanced electronic coupling increases both the free carrier generation efficiency and the short-range mobility in NPL solids. The results show a straightforward method of controlling the interfacial electronic coupling strength for developing functional optoelectronic devices through thermal treatments.
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Affiliation(s)
- Shuai Chen
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Samir H Al-Hilfi
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Guangbo Chen
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstr. 4, 01062, Dresden, Germany
| | - Heng Zhang
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Wenhao Zheng
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Lucia Di Virgilio
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Jaco J Geuchies
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Junren Wang
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Xinliang Feng
- Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, Mommsenstr. 4, 01062, Dresden, Germany
- Max Planck Institute of Microstructure Physics, D-06120, Halle (Saale), Germany
| | - Andreas Riedinger
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Mischa Bonn
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Hai I Wang
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
- Nanophotonics, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, Utrecht, 3584 CC, The Netherlands
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7
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Kuznetsov IE, Piryazev AA, Akhkiamova AF, Sideltsev ME, Anokhin DV, Lolaeva AV, Gapanovich MV, Zamoretskov DS, Sagdullina DK, Klyuev MV, Ivanov DA, Akkuratov AV. Remarkable Enhancement of Hole Mobility of Novel DA-D'-AD Small Molecules by Thermal Annealing: Effect of the D'-Bridge Block. Chemphyschem 2023; 24:e202300310. [PMID: 37560983 DOI: 10.1002/cphc.202300310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 08/08/2023] [Accepted: 08/09/2023] [Indexed: 08/11/2023]
Abstract
Conjugated small molecules are advanced semiconductor materials with attractive physicochemical and optoelectronic properties enabling the development of next-generation electronic devices. The charge carrier mobility of small molecules strongly influences the efficiency of organic and hybrid electronics based on them. Herein, we report the synthesis of four novel small molecules and their investigation with regard to the impact of molecular structure and thermal treatment of films on charge carriers' mobility. The benzodithiophene-containing compounds (BDT) were shown to be more promising in terms of tuning the morphology upon thermal treatment. Impressive enhancement of hole mobilities by more than 50 times was found for annealed films based on a compound M4 comprising triisopropylsilyl-functionalized BDT core. The results provide a favorable experience and strategy for the rational design of state-of-the-art organic semiconductor materials (OSMs) and for improving their charge-transport characteristics.
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Affiliation(s)
- Ilya E Kuznetsov
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences (FRC PCPMC RAS), Academician Semenov Avenue 1, Chernogolovka, 142432, Russian Federation
| | - Alexey A Piryazev
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences (FRC PCPMC RAS), Academician Semenov Avenue 1, Chernogolovka, 142432, Russian Federation
- Moscow State University, GSP-1, 1 Leninskiye Gory, Moscow, 119991, Russian Federation
- Sirius University of Science and Technology, 1 Olympic Ave, 354340, Sochi, Russian Federation
| | - Azaliia F Akhkiamova
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences (FRC PCPMC RAS), Academician Semenov Avenue 1, Chernogolovka, 142432, Russian Federation
- Moscow State University, GSP-1, 1 Leninskiye Gory, Moscow, 119991, Russian Federation
| | - Maxim E Sideltsev
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences (FRC PCPMC RAS), Academician Semenov Avenue 1, Chernogolovka, 142432, Russian Federation
| | - Denis V Anokhin
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences (FRC PCPMC RAS), Academician Semenov Avenue 1, Chernogolovka, 142432, Russian Federation
- Moscow State University, GSP-1, 1 Leninskiye Gory, Moscow, 119991, Russian Federation
- Sirius University of Science and Technology, 1 Olympic Ave, 354340, Sochi, Russian Federation
| | - Alina V Lolaeva
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences (FRC PCPMC RAS), Academician Semenov Avenue 1, Chernogolovka, 142432, Russian Federation
| | - Mikhail V Gapanovich
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences (FRC PCPMC RAS), Academician Semenov Avenue 1, Chernogolovka, 142432, Russian Federation
- Moscow State University, GSP-1, 1 Leninskiye Gory, Moscow, 119991, Russian Federation
| | - Davlad S Zamoretskov
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences (FRC PCPMC RAS), Academician Semenov Avenue 1, Chernogolovka, 142432, Russian Federation
- Ivanovo State University, Ermaka 39, Ivanovo, 153025, Russian Federation
| | - Diana K Sagdullina
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences (FRC PCPMC RAS), Academician Semenov Avenue 1, Chernogolovka, 142432, Russian Federation
| | - Mikhail V Klyuev
- Ivanovo State University, Ermaka 39, Ivanovo, 153025, Russian Federation
| | - Dimitri A Ivanov
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences (FRC PCPMC RAS), Academician Semenov Avenue 1, Chernogolovka, 142432, Russian Federation
- Moscow State University, GSP-1, 1 Leninskiye Gory, Moscow, 119991, Russian Federation
- Sirius University of Science and Technology, 1 Olympic Ave, 354340, Sochi, Russian Federation
- Institut de Sciences des Matériaux de Mulhouse-IS2M CNRS UMR 7361, 15, rue Jean Starcky, F-68057, Mulhouse, France
| | - Alexander V Akkuratov
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences (FRC PCPMC RAS), Academician Semenov Avenue 1, Chernogolovka, 142432, Russian Federation
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8
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Gao Y, Lu J, Liao Q, Li S, Li Q, Li Z. Thermal annealing promoted room temperature phosphorescence: motion models and internal mechanism. Natl Sci Rev 2023; 10:nwad239. [PMID: 37854949 PMCID: PMC10581540 DOI: 10.1093/nsr/nwad239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/24/2023] [Accepted: 08/31/2023] [Indexed: 10/20/2023] Open
Abstract
Thermal annealing has been proven to be an efficient method to optimize the device performance of organic and polymeric opto-electronic materials. However, no detailed information of aggregate structures was obtained for a deeper understanding of what happens during thermal annealing. Herein, through modulation of molecular configurations by tunable linkage positions, and the amplified amplitudes of molecular motions by incorporation of additional methylene units, accurate changes of aggregated structures upon thermal annealing have been achieved, accompanying with the 'turn-on' room temperature phosphorescence (RTP) response by about 4800- and 177-fold increase of lifetimes. The stretching and swing motion models have been proposed, which afforded an efficient way to investigate the science of dynamic aggregation in depth.
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Affiliation(s)
- Yan Gao
- Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, TaiKang Center for Life and Medical Sciences, Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Jie Lu
- Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, TaiKang Center for Life and Medical Sciences, Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Qiuyan Liao
- Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, TaiKang Center for Life and Medical Sciences, Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Shuhui Li
- Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, TaiKang Center for Life and Medical Sciences, Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Qianqian Li
- Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, TaiKang Center for Life and Medical Sciences, Department of Chemistry, Wuhan University, Wuhan 430072, China
| | - Zhen Li
- Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials, TaiKang Center for Life and Medical Sciences, Department of Chemistry, Wuhan University, Wuhan 430072, China
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9
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Long PX, Lai YY, Kang PH, Chuang CH, Cheng YJ. High photoresponsivity MoS 2phototransistor through enhanced hole trapping HfO 2gate dielectric. Nanotechnology 2023; 35:025204. [PMID: 37816338 DOI: 10.1088/1361-6528/ad01c2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 10/09/2023] [Indexed: 10/12/2023]
Abstract
Phototransistor using 2D semiconductor as the channel material has shown promising potential for high sensitivity photo detection. The high photoresponsivity is often attributed to the photogating effect, where photo excited holes are trapped at the gate dielectric interface that provides additional gate electric field to enhance channel charge carrier density. Gate dielectric material and its deposition processing conditions can have great effect on the interface states. Here, we use HfO2gate dielectric with proper thermal annealing to demonstrate a high photoresponsivity MoS2phototransistor. When HfO2is annealed in H2atmosphere, the photoresponsivity is enhanced by an order of magnitude as compared with that of a phototransistor using HfO2without annealing or annealed in Ar atmosphere. The enhancement is attributed to the hole trapping states introduced at HfO2interface through H2annealing process, which greatly enhances photogating effect. The phototransistor exhibits a very large photoresponsivity of 1.1 × 107A W-1and photogain of 3.3 × 107under low light illumination intensity. This study provides a processing technique to fabricate highly sensitive phototransistor for low optical power detection.
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Affiliation(s)
- Pei-Xuan Long
- Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan
- Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Yung-Yu Lai
- Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan
| | - Pei-Hao Kang
- Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan
| | - Chi-Huang Chuang
- Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan
| | - Yuh-Jen Cheng
- Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan
- Institute of Electro-Optical Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
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10
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Gagaoudakis E, Tsakirakis A, Moschogiannaki M, Sfakianou A, Binas V. Room-Temperature Nitric Oxide Gas Sensors Based on NiO/SnO 2 Heterostructures. Sensors (Basel) 2023; 23:8583. [PMID: 37896676 PMCID: PMC10610847 DOI: 10.3390/s23208583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/16/2023] [Accepted: 10/18/2023] [Indexed: 10/29/2023]
Abstract
Nitric oxide (NO) is a very well-known indoor pollutant, and high concentrations of it in the atmosphere lead to acid rain. Thus, there is great demand for NO sensors that have the ability to work at room temperature. In this work, NiO/SnO2 heterostructures have been prepared via the polyol process and were tested against different concentrations of NO gas at room temperature. The structural and morphological characteristics of the heterostructures were examined using X-ray diffraction and scanning electron microscopy, respectively, while the ratio of NiO to SnO2 was determined through the use of energy-dispersive spectrometry. The effects of both pH and thermal annealing on the morphological, structural and gas-sensing properties of the heterostructure were investigated. It was found that the morphology of the heterostructures consisted of rod-like particles with different sizes, depending on the temperature of thermal annealing. Moreover, NiO/SnO2 heterostructures synthesized with pH = 8 and annealed at 900 °C showed a response of 1.8% towards 2.5 ppm NO at room temperature. The effects of humidity as well as of stability on the gas sensing performance were also investigated.
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Affiliation(s)
- Emmanouil Gagaoudakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH-IESL), 700 13 Heraklion, Greece; (A.T.); (M.M.); (A.S.); (V.B.)
| | - Apostolos Tsakirakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH-IESL), 700 13 Heraklion, Greece; (A.T.); (M.M.); (A.S.); (V.B.)
- Department of Materials Science and Technology, University of Crete, 700 13 Herakleion, Greece
| | - Marilena Moschogiannaki
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH-IESL), 700 13 Heraklion, Greece; (A.T.); (M.M.); (A.S.); (V.B.)
- Department of Materials Science and Technology, University of Crete, 700 13 Herakleion, Greece
| | - Angeliki Sfakianou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH-IESL), 700 13 Heraklion, Greece; (A.T.); (M.M.); (A.S.); (V.B.)
- Department of Physics, University of Crete, 700 13 Herakleion, Greece
| | - Vassilios Binas
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH-IESL), 700 13 Heraklion, Greece; (A.T.); (M.M.); (A.S.); (V.B.)
- Department of Physics, University of Crete, 700 13 Herakleion, Greece
- Department of Chemistry, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece
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11
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Park JH, Wang CPJ, Lee HJ, Hong KS, Ahn JH, Cho YW, Lee JH, Seo HS, Park W, Kim SN, Park CG, Lee W, Kim TH. Uniform Gold Nanostructure Formation via Weakly Adsorbed Gold Films and Thermal Annealing for Reliable Localized Surface Plasmon Resonance-Based Detection of DNase-I. Small 2023; 19:e2302023. [PMID: 37246275 DOI: 10.1002/smll.202302023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 05/04/2023] [Indexed: 05/30/2023]
Abstract
Deoxyribonuclease-I (DNase-I), a representative endonuclease, is an important biomarker for the diagnosis of infectious diseases and cancer progression. However, enzymatic activity decreases rapidly ex vivo, which highlights the need for precise on-site detection of DNase-I. Here, a localized surface plasmon resonance (LSPR) biosensor that enables the simple and rapid detection of DNase-I is reported. Moreover, a novel technique named electrochemical deposition and mild thermal annealing (EDMIT) is applied to overcome signal variations. By taking advantage of the low adhesion of gold clusters on indium tin oxide substrates, both the uniformity and sphericity of gold nanoparticles are increased under mild thermal annealing conditions via coalescence and Ostwald ripening. This ultimately results in an approximately 15-fold decrease in LSPR signal variations. The linear range of the fabricated sensor is 20-1000 ng mL-1 with a limit of detection (LOD) of 127.25 pg mL-1 , as demonstrated by spectral absorbance analyses. The fabricated LSPR sensor stably measured DNase-I concentrations from samples collected from both an inflammatory bowel disease (IBD) mouse model, as well as human patients with severe COVID-19 symptoms. Therefore, the proposed LSPR sensor fabricated via the EDMIT method can be used for early diagnosis of other infectious diseases.
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Affiliation(s)
- Joon-Ha Park
- School of Integrative Engineering, Chung-Ang University, 06974, Seoul, Republic of Korea
| | - Chi-Pin James Wang
- Department of Biomedical Engineering, SKKU Institute for Convergence, Sungkyunkwan University (SKKU), 16419, Suwon, Republic of Korea
- Department of Intelligent Precision Healthcare Convergence, SKKU Institute for Convergence, Sungkyunkwan University (SKKU), 16419, Suwon, Republic of Korea
| | - Hye-Jin Lee
- Department of Chemistry, Sungkyunkwan University, 16419, Suwon, Republic of Korea
| | - Kyung Soo Hong
- Division of Pulmonology and Allergy, Department of Internal Medicine, College of Medicine, Yeungnam University, Regional Center for Respiratory Diseases, Yeungnam University Medical Center, 42415, Daegu, Republic of Korea
| | - Jung Hong Ahn
- Division of Pulmonology and Allergy, Department of Internal Medicine, College of Medicine, Yeungnam University, Regional Center for Respiratory Diseases, Yeungnam University Medical Center, 42415, Daegu, Republic of Korea
| | - Yeon-Woo Cho
- School of Integrative Engineering, Chung-Ang University, 06974, Seoul, Republic of Korea
| | - Jeong-Hyeon Lee
- School of Integrative Engineering, Chung-Ang University, 06974, Seoul, Republic of Korea
| | - Hee Seung Seo
- Department of Biomedical Engineering, SKKU Institute for Convergence, Sungkyunkwan University (SKKU), 16419, Suwon, Republic of Korea
- Department of Intelligent Precision Healthcare Convergence, SKKU Institute for Convergence, Sungkyunkwan University (SKKU), 16419, Suwon, Republic of Korea
| | - Wooram Park
- Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Seoburo 2066, Suwon, Gyeonggi, 16419, Republic of Korea
| | - Se-Na Kim
- Research and Development Center, MediArk Inc., Cheongju, Chungbuk, 28644, Republic of Korea
- Department of Industrial Cosmetic Science, College of Bio-Health University System, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Chun Gwon Park
- Department of Biomedical Engineering, SKKU Institute for Convergence, Sungkyunkwan University (SKKU), 16419, Suwon, Republic of Korea
- Department of Intelligent Precision Healthcare Convergence, SKKU Institute for Convergence, Sungkyunkwan University (SKKU), 16419, Suwon, Republic of Korea
- Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Wonhwa Lee
- Department of Chemistry, Sungkyunkwan University, 16419, Suwon, Republic of Korea
| | - Tae-Hyung Kim
- School of Integrative Engineering, Chung-Ang University, 06974, Seoul, Republic of Korea
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12
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Zhu Y, Huang C, Zhang L, Andelman D, Man X. The Process-Directed Self-Assembly of Block Copolymer Particles. Macromol Rapid Commun 2023; 44:e2300176. [PMID: 37071857 DOI: 10.1002/marc.202300176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/13/2023] [Indexed: 04/20/2023]
Abstract
The kinetic paths of structural evolution and formation of block copolymer (BCP) particles are explored using dynamic self-consistent field theory (DSCFT). It is shown that the process-directed self-assembly of BCP immersed in a poor solvent leads to the formation of striped ellipsoids, onion-like particles and double-spiral lamellar particles. The theory predicts a reversible path of shape transition between onion-like particles and striped ellipsoidal ones by regulating the temperature (related to the Flory-Huggins parameter between the two components of BCP, χAB ) and the selectivity of solvent toward one of the two BCP components. Furthermore, a kinetic path of shape transition from onion-like particles to double-spiral lamellar particles, and then back to onion-like particles is demonstrated. By investigating the inner-structural evolution of a BCP particle, it is identified that changing the intermediate bi-continuous structure into a layered one is crucial for the formation of striped ellipsoidal particles. Another interesting finding is that the formation of onion-like particles is characterized by a two-stage microphase separation. The first is induced by the solvent preference, and the second is controlled by the thermodynamics. The findings lead to an effective way of tailoring nanostructure of BCP particles for various industrial applications.
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Affiliation(s)
- Yanyan Zhu
- Center of Soft Matter Physics and its Applications, School of Physics, Beihang University, Beijing, 100191, China
| | - Changhang Huang
- Center of Soft Matter Physics and its Applications, School of Physics, Beihang University, Beijing, 100191, China
| | - Liangshun Zhang
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - David Andelman
- School of Physics and Astronomy, Tel Aviv University, Ramat Aviv 69978, Tel Aviv, Israel
| | - Xingkun Man
- Center of Soft Matter Physics and its Applications, School of Physics, Beihang University, Beijing, 100191, China
- Peng Huanwu Collaborative Center for Research and Education, Beihang University, Beijing, 100191, China
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13
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Wang Z, Li R, Zhang Y, Chan CLC, Haataja JS, Yu K, Parker RM, Vignolini S. Tuning the Color of Photonic Glass Pigments by Thermal Annealing. Adv Mater 2023; 35:e2207923. [PMID: 36482805 DOI: 10.1002/adma.202207923] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/21/2022] [Indexed: 06/17/2023]
Abstract
Thermal or solvent annealing is commonly employed to enhance phase separation and remove defects in block copolymer (BCP) films, leading to well-resolved nanostructures. Annealing is of particular importance for photonic BCP materials, where large, well-ordered lamellar domains are required to generate strong reflections at visible wavelengths. However, such strategies have not been considered for porous BCP systems, such as inverse photonic glasses, where the structure (and thus the optical response) is no longer defined solely by the chemical compatibility of the blocks, but by the size and arrangement of voids within the BCP matrix. In this study, a demonstration of how the concept of "thermal annealing" can be applied to bottlebrush block copolymer (BBCP) microparticles with a photonic glass architecture is presented, enabling their coloration to be tuned from blue to red. By comparing biocompatible BBCPs with similar composition, but different thermal behavior, it is shown that this process is driven by both a temperature-induced softening of the BBCP matrix (i.e., polymer mobility) and the absence of microphase separation (enabling diffusion-induced swelling of the pores). Last, this concept is applied toward the production of a thermochromic patterned hydrogel, exemplifying the potential of such responsive biocompatible photonic-glass pigments toward smart labeling or anticounterfeiting applications.
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Affiliation(s)
- Zhen Wang
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Ruiting Li
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Yating Zhang
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Chun Lam Clement Chan
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Johannes S Haataja
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Kui Yu
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Richard M Parker
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Silvia Vignolini
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
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14
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Korolev DS, Kriukov RN, Matyunina KS, Nikolskaya AA, Belov AI, Mikhaylov AN, Sushkov AA, Pavlov DA, Tetelbaum DI. Structure and Chemical Composition of Ion-Synthesized Gallium Oxide Nanocrystals in Dielectric Matrices. Nanomaterials (Basel) 2023; 13:nano13101658. [PMID: 37242074 DOI: 10.3390/nano13101658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 05/04/2023] [Accepted: 05/15/2023] [Indexed: 05/28/2023]
Abstract
The ion-beam synthesis of Ga2O3 nanocrystals in dielectric matrices on silicon is a novel and promising way for creating nanomaterials based on gallium oxide. This research studies the regularities of changes, depending on the synthesis regimes used, in the chemical composition of ion-implanted SiO2/Si and Al2O3/Si samples. It has been shown that the formation of Ga-O chemical bonds occurs even in the absence of thermal annealing. We also found the conditions of ion irradiation and annealing at which the content of oxidized gallium in the stochiometric state of Ga2O3 exceeds 90%. For this structure, the formation of Ga2O3 nanocrystalline inclusions was confirmed by transmission electron microscopy.
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Affiliation(s)
- Dmitry S Korolev
- Research Institute of Physics and Technology, Lobachevsky State University of Nizhny Novgorod, 603022 Nizhny Novgorod, Russia
| | - Ruslan N Kriukov
- Research Institute of Physics and Technology, Lobachevsky State University of Nizhny Novgorod, 603022 Nizhny Novgorod, Russia
- Department of Physics, Lobachevsky State University of Nizhny Novgorod, 603022 Nizhny Novgorod, Russia
| | - Kristina S Matyunina
- Department of Physics, Lobachevsky State University of Nizhny Novgorod, 603022 Nizhny Novgorod, Russia
| | - Alena A Nikolskaya
- Research Institute of Physics and Technology, Lobachevsky State University of Nizhny Novgorod, 603022 Nizhny Novgorod, Russia
| | - Alexey I Belov
- Research Institute of Physics and Technology, Lobachevsky State University of Nizhny Novgorod, 603022 Nizhny Novgorod, Russia
| | - Alexey N Mikhaylov
- Research Institute of Physics and Technology, Lobachevsky State University of Nizhny Novgorod, 603022 Nizhny Novgorod, Russia
| | - Artem A Sushkov
- Research Institute of Physics and Technology, Lobachevsky State University of Nizhny Novgorod, 603022 Nizhny Novgorod, Russia
| | - Dmitry A Pavlov
- Department of Physics, Lobachevsky State University of Nizhny Novgorod, 603022 Nizhny Novgorod, Russia
| | - David I Tetelbaum
- Research Institute of Physics and Technology, Lobachevsky State University of Nizhny Novgorod, 603022 Nizhny Novgorod, Russia
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15
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Zhang Q, Hao A, Xing P. Thermal Annealing Triggered Chirality Inversion through Solvent Migration. ACS Nano 2023; 17:9468-9477. [PMID: 37140567 DOI: 10.1021/acsnano.3c01647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Solvent strategy is a powerful tool to manipulate chirality and self-assembly over hierarchical levels, yet the solvent dynamics during thermal annealing in controlling chirality and chiroptical features remain a mystery. Here, we show how solvent migration affects molecular folding and chirality through thermal annealing. Pyrene segments were conjugated to a 2,6-diamide pyridine skeleton, where intramolecular hydrogen bonds anchor the chiral geometry. The orientation of pyrene blades adopted π···π and CH···π stacking, respectively, in organic solvents (dimethyl sulfoxide, DMSO) and aqueous media, leading to the chiroptical inversion. Thermal annealing treatment of the DMSO/H2O mixture homogenized distribution of solvents that further altered the molecular folding from CH···π to π···π modality. Solvent migration from aggregates to bulky phases was evidenced by the nuclear magnetic resonance and molecular dynamic simulations, leading to the rearrangement of molecular packing with luminescent changes. It realized a consecutive chiroptical inversion using solvent strategy and thermal annealing.
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Affiliation(s)
- Qi Zhang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
| | - Aiyou Hao
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
| | - Pengyao Xing
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China
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16
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Sharma K, Agrawal A, Masud A, Satija SK, Ankner JF, Douglas JF, Karim A. Hiking down the Free Energy Landscape Using Sequential Solvent and Thermal Processing for Versatile Ordering of Block Copolymer Films. ACS Appl Mater Interfaces 2023; 15:21562-21574. [PMID: 37083352 DOI: 10.1021/acsami.2c21924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The kinetics and morphology of the ordering of block copolymer (BCP) films are highly dependent on the processing pathway, as the enthalpic and entropic forces driving the ordering processes can be quite different depending on process history. We may gain some understanding and control of this variability of BCP morphology with processing history through a consideration of the free energy landscape of the BCP material and a consideration of how the processing procedure moves the system through this energy landscape in a way that avoids having the system becoming trapped into well-defined metastable minima having a higher free energy than the target low free energy ordered structure. It is well known that standard thermal annealing (TA) of BCPs leads to structures corresponding to a well-defined stable free energy minimum; however, the BCP must be annealed for a very long time before the target low free energy structures can be achieved. Herein, we show that the same target low-energy structure can be achieved relatively quickly by subjecting as-cast films to an initial solvent annealing [direct immersion annealing (DIA) or solvent vapor annealing (SVA)] procedure, followed by a short period of TA. This process relies on lowering the activation energy barrier by reducing the glass-transition temperature through DIA (or SVA), followed by a multi-interface chain rearrangement through sequential TA. This energy landscape approach to ordering should be applicable to the process design for ordering many other complex materials.
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Affiliation(s)
- Kshitij Sharma
- William A. Brookshire, Department of Chemical & Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Aman Agrawal
- William A. Brookshire, Department of Chemical & Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Ali Masud
- William A. Brookshire, Department of Chemical & Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
| | - Sushil K Satija
- National Institute of Standards and Technology, Center for Neutron Research, Gaithersburg, Maryland 20899, United States
| | - John F Ankner
- Second Target Station Project, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
| | - Jack F Douglas
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Alamgir Karim
- William A. Brookshire, Department of Chemical & Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States
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17
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Storm A, Köster J, Ghorbani-Asl M, Kretschmer S, Gorelik TE, Kinyanjui MK, Krasheninnikov AV, Kaiser U. Electron-Beam- and Thermal-Annealing-Induced Structural Transformations in Few-Layer MnPS 3. ACS Nano 2023; 17:4250-4260. [PMID: 36802543 DOI: 10.1021/acsnano.2c05895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Quasi-two-dimensional (2D) manganese phosphorus trisulfide, MnPS3, which exhibits antiferromagnetic ordering, is a particularly interesting material in the context of magnetism in a system with reduced dimensionality and its potential technological applications. Here, we present an experimental and theoretical study on modifying the properties of freestanding MnPS3 by local structural transformations via electron irradiation in a transmission electron microscope and by thermal annealing under vacuum. In both cases we find that MnS1-xPx phases (0 ≤ x < 1) form in a crystal structure different from that of the host material, namely that of the α- or γ-MnS type. These phase transformations can both be locally controlled by the size of the electron beam as well as by the total applied electron dose and simultaneously imaged at the atomic scale. For the MnS structures generated in this process, our ab initio calculations indicate that their electronic and magnetic properties strongly depend on both in-plane crystallite orientation and thickness. Moreover, the electronic properties of the MnS phases can be further tuned by alloying with phosphorus. Therefore, our results show that electron beam irradiation and thermal annealing can be utilized to grow phases with distinct properties starting from freestanding quasi-2D MnPS3.
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Affiliation(s)
- Alexander Storm
- Electron Microscopy Group of Materials Science, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Janis Köster
- Electron Microscopy Group of Materials Science, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Mahdi Ghorbani-Asl
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Centre Dresden-Rossendorf, 01328 Dresden, Germany
| | - Silvan Kretschmer
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Centre Dresden-Rossendorf, 01328 Dresden, Germany
| | - Tatiana E Gorelik
- Electron Microscopy Group of Materials Science, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Michael Kiarie Kinyanjui
- Electron Microscopy Group of Materials Science, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Arkady V Krasheninnikov
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Centre Dresden-Rossendorf, 01328 Dresden, Germany
- Department of Applied Physics, Aalto University, PO Box 14100, 00076 Aalto, Finland
| | - Ute Kaiser
- Electron Microscopy Group of Materials Science, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
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18
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Awasthi V, Malik P, Goel R, Srivastava P, Dubey SK. Nanogap-Rich Surface-Enhanced Raman Spectroscopy-Active Substrate Based on Double-Step Deposition and Annealing of the Au Film over the Back Side of Polished Si. ACS Appl Mater Interfaces 2023; 15:10250-10260. [PMID: 36757206 DOI: 10.1021/acsami.2c21378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) is a highly sensitive and rapid detection technique that is used for detection of various analytes in trace quantities. We present a sensitive, large-area, and nanogap-rich SERS-active substrate by altering a thin gold (Au) film on the unpolished side of a single-side polished silicon wafer by repeated thermal deposition and annealing in an argon environment. The repeated thermal deposition and annealing process was compared on both sides of a one-side-polished silicon wafer; however, the rear side (etched/unpolished side) demonstrated a more enhanced Raman signal owing to the larger effective area. The proposed substrate can be fabricated easily, having a high density of hotspots distributed uniformly all over the substrate. This ensures easy, rapid, and sensitive detection of analytes with a high degree of reproducibility, repeatability, and acceptable uniformity. The optimized substrate shows a high degree of stability with time when exposed to the ambient environment for a longer duration of 148 days. The reported substrate can detect up to 10-11 M concentrations of 2,4,6-trinitrotoluene (TNT) and 2,4-dinitrotoluene (DNT), with limits of detection (LODs) of 1.22 and 1.26 ng/L, respectively. This work not only presents the efficient and sensitive SERS-active substrate but also shows the advantages of using the rear side of a one-side-polished silicon substrate as a SERS-active chip.
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Affiliation(s)
- Vimarsh Awasthi
- SeNSE Centre, Indian Institute of Technology Delhi, Delhi 110016, India
| | - Pariksha Malik
- Nanostech Laboratory, Department of Physics, Indian Institute of Technology Delhi, Delhi 110016, India
| | - Richa Goel
- SeNSE Centre, Indian Institute of Technology Delhi, Delhi 110016, India
| | - Pankaj Srivastava
- Nanostech Laboratory, Department of Physics, Indian Institute of Technology Delhi, Delhi 110016, India
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19
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Hendeniya N, Hillery K, Chang BS. Processive Pathways to Metastability in Block Copolymer Thin Films. Polymers (Basel) 2023; 15:polym15030498. [PMID: 36771799 PMCID: PMC9920306 DOI: 10.3390/polym15030498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 01/02/2023] [Accepted: 01/04/2023] [Indexed: 01/19/2023] Open
Abstract
Block copolymers (BCPs) self-assemble into intricate nanostructures that enhance a multitude of advanced applications in semiconductor processing, membrane science, nanopatterned coatings, nanocomposites, and battery research. Kinetics and thermodynamics of self-assembly are crucial considerations in controlling the nanostructure of BCP thin films. The equilibrium structure is governed by a molecular architecture and the chemistry of its repeat units. An enormous library of materials has been synthesized and they naturally produce a rich equilibrium phase diagram. Non-equilibrium phases could potentially broaden the structural diversity of BCPs and relax the synthetic burden of creating new molecules. Furthermore, the reliance on synthesis could be complicated by the scalability and the materials compatibility. Non-equilibrium phases in BCPs, however, are less explored, likely due to the challenges in stabilizing the metastable structures. Over the past few decades, a variety of processing techniques were introduced that influence the phase transformation of BCPs to achieve a wide range of morphologies. Nonetheless, there is a knowledge gap on how different processive pathways can induce and control the non-equilibrium phases in BCP thin films. In this review, we focus on different solvent-induced and thermally induced processive pathways, and their potential to control the non-equilibrium phases with regards to their unique aspects and advantages. Furthermore, we elucidate the limitations of these pathways and discuss the potential avenues for future investigations.
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20
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Yang L, Tao Y, Gordon MP, Menon AK, Chen Y, Prasher RS, Urban JJ. Morphological Ordering of the Organic Layer for High-Performance Hybrid Thermoelectrics. ACS Appl Mater Interfaces 2022; 14:57460-57470. [PMID: 36524813 DOI: 10.1021/acsami.2c19156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Inorganic-organic hybrids, such as Te-PEDOT:PSS core/shell nanowires, have emerged as a class of promising thermoelectric materials with combined attributes of mechanical flexibility and low cost. However, the poorly understood structure-property relationship calls for further investigation for performance enhancement. Here, through precise treatments of focused electron beam irradiation and thermal annealing on individual Te-PEDOT:PSS nanowires, new, nonchemical mechanisms are introduced to specifically engineer the organic phase, and the measured results provide an unprecedented piece of evidence, confirming the dominant role of organic shell in charge transport. Paired with the Kang-Snyder model and molecular dynamics simulations, this work provides mechanistic insights in terms of heating-enabled morphological ordering of the polymer chains. The measured results show that thermal annealing on the 42 nm nanowire results in a ZT value of 0.78 at 450 K. Through leveraging the interfacial self-assembly of the organic phase to construct a high electrical conductivity domain, this work lays out a clear framework for the development of next-generation soft thermoelectrics.
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Affiliation(s)
- Lin Yang
- Department of Advanced Manufacturing and Robotics, College of Engineering, Peking University, Beijing100871, P. R. China
- Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
| | - Yi Tao
- School of Mechanical Engineering and Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing210096, P. R. China
| | - Madeleine P Gordon
- Applied Science and Technology Graduate Group, University of California, Berkeley, California94720, United States
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
| | - Akanksha K Menon
- Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia30332, United States
| | - Yunfei Chen
- School of Mechanical Engineering and Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, Southeast University, Nanjing210096, P. R. China
| | - Ravi S Prasher
- Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
- Department of Mechanical Engineering, University of California, Berkeley, California94720, United States
| | - Jeffrey J Urban
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California94720, United States
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21
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Pham QT, Ngo GL, Nguyen XA, Nguyen CT, Ledoux-Rak I, Lai ND. Direct Synthesis of Gold Nanoparticles in Polymer Matrix. Polymers (Basel) 2022; 15. [PMID: 36616365 DOI: 10.3390/polym15010016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/12/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
We report an original method for directly fabricating gold nanoparticles (Au NPs) in a polymer matrix using a thermal treatment technique and theoretically and experimentally investigate their plasmonic properties. The polymeric-metallic nanocomposite samples were first prepared by simply mixing SU-8 resist and Au salt with different concentrations. The Au NPs growth was triggered inside the polymer through a thermal process on a hot plate and in air environment. The Au NPs creation was confirmed by the color of the nanocomposite thin films and by absorption spectra measurements. The Au NPs sizes and distributions were confirmed by transmission electron microscope measurements. It was found that the concentrations of Au salt and the annealing temperatures and durations are all crucial for tuning the Au NPs sizes and distributions, and, thus, their optical properties. We also propose a simulation model for calculations of Au NPs plasmonic properties inside a polymer medium. We realized that Au NPs having large sizes (50 to 100 nm) play an important role in absorption spectra measurements, as compared to the contribution of small NPs (<20 nm), even if the relative amount of big Au NPs is small. This simple, low-cost, and highly reproducible technique allows us to obtain plasmonic NPs within polymer thin films on a large scale, which can be potentially applied to many fields.
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Agustin-Salazar S, Ricciulli M, Ambrogi V, Cerruti P, Scarinzi G. Thermomechanical Properties and Biodegradation Behavior of Itaconic Anhydride-Grafted PLA/Pecan Nutshell Biocomposites. Polymers (Basel) 2022; 14:polym14245532. [PMID: 36559900 PMCID: PMC9785769 DOI: 10.3390/polym14245532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/07/2022] [Accepted: 12/10/2022] [Indexed: 12/23/2022] Open
Abstract
The use of lignocellulose-rich biowaste as reinforcing filler in biodegradable polymers represents a sustainable option to obtain cost-effective bio-based materials to be used for several applications. In addition, the scarce polymer-biofiller interaction can be improved by reactive functionalization of the matrix. However, the obtained biocomposites might show high thermal deformability and possibly a slow biodegradation rate. In this work, polylactic acid (PLA) was first chemically modified with itaconic anhydride, and then biocomposites containing 50 wt.% of pecan (Carya illinoinensis) nutshell (PNS) biowaste were prepared and characterized. Their physical and morphological properties were determined, along with their biodegradation behavior in soil. Moreover, the effects of two environmentally friendly physical treatments, namely ball-milling of the filler and thermal annealing on biocomposites, were assessed. Grafting increased PLA thermal-oxidative stability and crystallinity. The latter was further enhanced by the presence of PNS, achieving a 30% overall increase compared to the plain matrix. Accordingly, the biocomposites displayed mechanical properties comparable to those of the plain matrix. Thermal annealing dramatically increased the mechanical and thermomechanical properties of all materials, and the heat deflection temperature of the biocomposites dramatically increased up to 60 °C with respect to the non-annealed samples. Finally, PNS promoted PLA biodegradation, triggering the swelling of the composites under soil burial, and accelerating the removal of the polymer amorphous phase. These results highlight the potential of combining natural fillers and environmentally benign physicochemical treatments to tailor the properties of PLA biocomposites. The high biofiller content used in this work, in conjunction with the chemical and physico-mechanical treatments applied, increased the thermal, mechanical, and thermomechanical performance of PLA biocomposites while improving their biodegradation behavior. These outcomes allow for widening the application field of PLA biocomposites in those areas requiring a stiff and lightweight material with low deformability and faster biodegradability.
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Affiliation(s)
- Sarai Agustin-Salazar
- Institute for Polymers, Composites and Biomaterials (IPCB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli, Italy
- Department of Chemical and Metallurgical Engineering (DIQyM), University of Sonora, Building 5B, Del Conocimiento, Centro, Hermosillo C.P. 83000, Sonora, Mexico
- Correspondence: (S.A.-S.); (P.C.)
| | - Marco Ricciulli
- Department of Chemical, Materials and Production Engineering (DICMAPI), University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Veronica Ambrogi
- Institute for Polymers, Composites and Biomaterials (IPCB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli, Italy
- Department of Chemical, Materials and Production Engineering (DICMAPI), University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Pierfrancesco Cerruti
- Institute for Polymers, Composites and Biomaterials (IPCB-CNR), Via Gaetano Previati, 1/E, 23900 Lecco, Italy
- Correspondence: (S.A.-S.); (P.C.)
| | - Gennaro Scarinzi
- Institute for Polymers, Composites and Biomaterials (IPCB-CNR), Via Campi Flegrei 34, 80078 Pozzuoli, Italy
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Zhang L, Sun R, Zhang Z, Zhang J, Zhu Q, Ma W, Min J, Wei Z, Deng D. Donor End-Capped Alkyl Chain Length Dependent Non-Radiative Energy Loss in All-Small-Molecule Organic Solar Cells. Adv Mater 2022; 34:e2207020. [PMID: 36263872 DOI: 10.1002/adma.202207020] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/22/2022] [Indexed: 06/16/2023]
Abstract
A critical bottleneck for further efficiency breakthroughs in organic solar cells (OSCs) is to minimize the non-radiative energy loss (eΔVnr ) while maximizing the charge generation. With the development of highly emissive low-bandgap non-fullerene acceptors, the design of high-performance donors becomes critical to enable the blend with the electroluminescence quantum efficiency to approach or surpass the pristine acceptor. Herein, by shortening the end-capped alkyl chains of the small-molecular donors from hexyl (MPhS-C6) to ethyl (MPhS-C2), the material obtained aggregation that was insensitive to thermal annealing (TA) along with condensed packing simultaneously. The former leads to small phase separation and suppressed upshifts of the highest occupied molecular orbital energy level during TA, and the latter facilitates its efficient charge-transport at aggregation-less packing. Hence, the ΔVnr decreases from 0.242 to 0.182 V, from MPhS-C6 to MPhS-C2 based OSCs. An excellent PCE of 17.11% is obtained by 1,8-diiodoctane addition due to almost unchanged high Jsc (26.6 mA cm-2 ) and Voc (0.888 V) with improved fill factor, which is the record efficiency with the smallest energy loss (0.497 eV) and ΔVnr (0.192 V) in all-small-molecule OSCs. These results emphasize the potential material design direction of obtaining concurrent TA-insensitive aggregation and condensed packing to maximize the device performances with a super low ΔVnr .
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Affiliation(s)
- Lili Zhang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
- Sino-Danish Center for Education and Research, Sino-Danish College, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Rui Sun
- The Institute for Advanced Studies, Wuhan University, Wuhan, 430072, P. R. China
| | - Ziqi Zhang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Jianqi Zhang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Qinglian Zhu
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Wei Ma
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, P. R. China
| | - Jie Min
- The Institute for Advanced Studies, Wuhan University, Wuhan, 430072, P. R. China
| | - Zhixiang Wei
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Dan Deng
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
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Vladoiu R, Mandes A, Dinca V, Matei E, Polosan S. Synthesis of Cobalt-Nickel Aluminate Spinels Using the Laser-Induced Thermionic Vacuum Arc Method and Thermal Annealing Processes. Nanomaterials (Basel) 2022; 12:3895. [PMID: 36364671 PMCID: PMC9657927 DOI: 10.3390/nano12213895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 11/02/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
To obtain highly homogeneous cobalt-nickel aluminate spinels with small crystallite sizes, CoNiAl alloy thin films were primarily deposited using Laser-induced Thermionic Vacuum Arc (LTVA) as a versatile method for performing processing of multiple materials, such as alloy/composite thin films, at a nanometric scale. Following thermal annealing in air, the CoNiAl metallic thin films were transformed into ceramic oxidic (Co,Ni)Al2O4 with controlled composition and crystallinity suitable for thermal stability and chemical resistance devices. Structural analysis revealed the formation of (Co,Ni)Al2O4 from the amorphous CoNiAl alloys. The mean crystallite size of the spinels was around 15 nm. Thermal annealing induces a densification process, increasing the film thickness together with the migration process of the aluminum toward the surface of the samples. The sheet resistance changed drastically from 200-240 Ω/sq to more than 106 Ω/sq, revealing a step-by-step conversion of the metallic character of the thin film to a dielectric oxidic structure. These cermet materials can be used as inert anodes for the solid oxide fuel cells (SOFCs), which require not only high stability with respect to oxidizing gases such as oxygen, but also good electrical conductivity. These combination metal-ceramics are known as bi-layer anodes. By controlling the crystallite size and the interplay between the oxide/metal composite, a balance between stability and electrical conductivity can be achieved.
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Affiliation(s)
- Rodica Vladoiu
- Faculty of Applied Sciences and Engineering, Dept of Physics, Ovidius University of Constanta, Mamaia Av. No 124, 900527 Constanta, Romania
- Academy of Romanian Scientists, Splaiul Independentei Street No. 54, 050094 Bucharest, Romania
| | - Aurelia Mandes
- Faculty of Applied Sciences and Engineering, Dept of Physics, Ovidius University of Constanta, Mamaia Av. No 124, 900527 Constanta, Romania
| | - Virginia Dinca
- Faculty of Applied Sciences and Engineering, Dept of Physics, Ovidius University of Constanta, Mamaia Av. No 124, 900527 Constanta, Romania
| | - Elena Matei
- National Institute of Materials Physics, P.O. Box MG-7, 077125 Bucharest-Magurele, Romania
| | - Silviu Polosan
- National Institute of Materials Physics, P.O. Box MG-7, 077125 Bucharest-Magurele, Romania
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Lyu F, Li X, Tian J, Li Z, Liu B, Chen Q. Temperature-Driven α-β Phase Transformation and Enhanced Electronic Property of 2H α-In 2Se 3. ACS Appl Mater Interfaces 2022; 14:23637-23644. [PMID: 35548977 DOI: 10.1021/acsami.2c03270] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In recent years, thin layered indium selenide (In2Se3) has attracted rapidly increasing attention due to its fascinating properties and promising applications. Here, we report the temperature-driven α-β phase transformation and the enhanced electronic property of 2H α-In2Se3. We find that 2H α-In2Se3 transforms to β-In2Se3 when it is heated to a high temperature, and the transformation temperature increases from 550 to 650 K with the thickness decreasing from 67 to 17 nm. Additionally, annealing the sample below the phase transformation temperature can effectively improve the electronic property of a 2H α-In2Se3 field-effect transistor, including increasing the on-state current, decreasing the off-state current, and improving the subthreshold swing. After annealing, not only the contact resistance decreases significantly but also the mobility at 300 K increases more than 2 times to 45.83 cm2 V-1 s-1, which is the highest among the reported values. Our results provide an effective method to improve the electrical property and the stability of the In2Se3 nanodevices.
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Affiliation(s)
- Fengjiao Lyu
- Key Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing 100871, China
| | - Xuan Li
- Key Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing 100871, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| | - Jiamin Tian
- Key Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing 100871, China
| | - Zhiwei Li
- Key Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing 100871, China
| | - Bo Liu
- Key Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing 100871, China
| | - Qing Chen
- Key Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing 100871, China
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Zhang D, Liu R, Ji S, Cai Y, Liang C, Li Z. Hierarchical WO 3-x Ultrabroadband Absorbers and Photothermal Converters Grown from Femtosecond Laser-Induced Periodic Surface Structures. ACS Appl Mater Interfaces 2022; 14:24046-24058. [PMID: 35484908 DOI: 10.1021/acsami.2c04523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Oxygen-vacancy-rich WO3-x absorbers are gaining increasing attention because of their extensive absorbance-based applications in near-infrared shielding, photocatalysis, sterilization, interfacial evaporator and electrochromic, photochromic, and photothermal fields. Thermal treatment in an oxygen-deficient atmosphere enables us to prepare WO3-x but lacks the capacity for finely manipulating the grown structures. In this work, we present that laser-induced periodic surface structure (LIPSS) obtained by femtosecond laser ablation is a good template to grow various hierarchical WO3-x ultrabroadband absorbers and photothermal converters by thermal oxidation annealing in air. Increasing annealing temperature from 600 to 1000 °C allows the manipulation of WO3-x crystal sizes from ∼70 nm to ∼4 μm, accompanied by a color transition from brown to dark blue and finally to yellow. Benefiting from annealing-induced surface cracks and phase transition into WO3-x (containing both WO3 and W18O49) at 600 °C, excellent UV-vis-NIR-MIR ultrabroadband absorbers were produced: >90% UV-NIR absorbance (0.3-2.5 μm) and 50-90% MIR absorbance (2.5-16 μm), much better than most W-based metamaterial absorbers. The higher the annealing temperature (1000 > 800 > 600 °C), the better the photothermal performances (sample temperature as the indicator) of annealed interfaces due to the increased oxidation rates and resultant thicker oxide layers (6, 150, and 507 μm), a trend which is more apparent upon the irradiation of high-density (3160 mW/cm2) and ultrabroadband (200-2500 nm) light but much less apparent for shorter-band (200-800, 420-800, 800-2500 nm, etc.) and less-intensity (1694, 1540, 1460 mW/cm2, etc.) light irradiation. This phenomenon indicates that (1) higher-performance ultrabroadband absorbers possess a higher photothermal conversion capacity; (2) thicker-WO3-x oxide layer converters are more effective in preserving photothermal heat; and (3) both the W-LIPSS and metal tungsten substrate can quickly dissipate the photothermal heat to inhibit heat accumulation in the oxide photothermal converters. It is also proved that ablation-induced high-pressure shockwaves can produce deformation layers in the subsurfaces to release annealing-induced stresses, beneficial for the formation of less-cracked non-stoichiometric WO3-x interfaces upon annealing. High-pressure shockwaves are also capable of inducing grain refinement of LIPSS, which facilitates a homogeneous growth of small non-stoichiometric metal-oxide crystals upon annealing. Our results indicate that femtosecond laser ablation is a convenient upstream template-fabrication technique compatible with the thermal oxidation annealing method to develop advanced functional oxygen-vacancy metal-oxide interfaces.
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Affiliation(s)
- Dongshi Zhang
- Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Ruijie Liu
- Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Sihan Ji
- Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Yunyu Cai
- Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Changhao Liang
- Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Zhuguo Li
- Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- The State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Lee S, Kim HM, Baek G, Park JS. Dry-Etchable Molecular Layer-Deposited Inhibitor Using Annealed Indicone Film for Nanoscale Area-Selective Deposition. ACS Appl Mater Interfaces 2021; 13:60144-60153. [PMID: 34878240 DOI: 10.1021/acsami.1c16112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In semiconductor production, the technology node of a device is becoming extremely small below 5 nm. Area selective deposition (ASD) is a promising technique for creating improved overlay or self-alignment, remedying a conventional top-down method. However, the conventional materials and process (self-assembled monolayer, polymer and carbon film fabricated by chemical vapor deposition, and spin coating) for ASD are not suitable for highly conformal deposition. Thus, we investigated a new strategy to deposit conformal films in ASD by molecular layer deposition (MLD). The MLD processes were conducted for an indicone film deposited by INCA-1 (bis(trimethysily)amidodiethyl indium) and hydroquinone (HQ), as well as an alucone film deposited by TMA (trimethylaluminum) and HQ. After thermal heat treatment of the MLD films, variations in thickness, refractive index, and constituent elements of the annealed MLD films were investigated. The indicone film was used as an inhibiting layer for ASD and was etchable with a dry-etching process. The reactive ion etching process on annealed indicone film was optimized according to plasma power, gas concentration, and working pressure. Ruthenium (Ru) ALD was then performed on the annealed MLD films to investigate nucleation delaying cycles and inhibiting properties. A patterned substrate with an MLD/Si line was created via the RIE process, which was allowed to observe the selectivity of the annealed MLD films. In addition, a patterned substrate of SiO2/annealed indicone/Mo was used to investigate the Ru-selective ALD at the nanoscale. The Ru thin film was selectively deposited on the Mo side-wall surface of a 3D trench structure. The growth of the Ru film was inhibited selectively on an annealed indicone surface of approximately 5 nm.
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Affiliation(s)
- Seunghwan Lee
- Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Hye-Mi Kim
- Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - GeonHo Baek
- Division of Nano-Scale Semiconductor Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Jin-Seong Park
- Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
- Division of Nano-Scale Semiconductor Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
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Nomoto K, Cui XY, Breen A, Ceguerra AV, Perez-Wurfl I, Conibeer G, Ringer SP. Effects of thermal annealing on the distribution of boron and phosphorus in p-i-n structured silicon nanocrystals embedded in silicon dioxide. Nanotechnology 2021; 33:075709. [PMID: 34763327 DOI: 10.1088/1361-6528/ac38e6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 11/11/2021] [Indexed: 06/13/2023]
Abstract
Thermal annealing temperature and time dictate the microstructure of semiconductor materials such as silicon nanocrystals (Si NCs). Herein, atom probe tomography (APT) and density functional theory (DFT) calculations are used to understand the thermal annealing temperature effects on Si NCs grown in a SiO2matrix and the distribution behaviour of boron (B) and phosphorus (P) dopant atoms. The APT results demonstrate that raising the annealing temperature promotes growth and increased P concentration of the Si NCs. The data also shows that the thermal annealing does not promote the incorporation of B atoms into Si NCs. Instead, B atoms tend to locate at the interface between the Si NCs and SiO2matrix. The DFT calculations support the APT data and reveal that oxygen vacancies regulate Si NC growth and dopant distribution. This study provides the detailed microstructure of p-type, intrinsic, and n-type Si NCs with changing annealing temperature and highlights how B and P dopants preferentially locate with respect to the Si NCs embedded in the SiO2matrix with the aid of oxygen vacancies. These findings will be useful towards future optoelectronic applications.
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Affiliation(s)
- Keita Nomoto
- The University of Sydney, Australian Centre for Microscopy & Microanalysis and School of Aerospace Mechanical and Mechatronic Engineering, 2006 Sydney, Australia
| | - Xiang-Yuan Cui
- The University of Sydney, Australian Centre for Microscopy & Microanalysis and School of Aerospace Mechanical and Mechatronic Engineering, 2006 Sydney, Australia
| | - Andrew Breen
- The University of Sydney, Australian Centre for Microscopy & Microanalysis and School of Aerospace Mechanical and Mechatronic Engineering, 2006 Sydney, Australia
| | - Anna V Ceguerra
- The University of Sydney, Australian Centre for Microscopy & Microanalysis and School of Aerospace Mechanical and Mechatronic Engineering, 2006 Sydney, Australia
| | - Ivan Perez-Wurfl
- School of Photovoltaic and Renewable Energy Engineering, The University of New South Wales, 2052 Kensington, Australia
| | - Gavin Conibeer
- School of Photovoltaic and Renewable Energy Engineering, The University of New South Wales, 2052 Kensington, Australia
| | - Simon P Ringer
- The University of Sydney, Australian Centre for Microscopy & Microanalysis and School of Aerospace Mechanical and Mechatronic Engineering, 2006 Sydney, Australia
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Grancharov G, Atanasova MD, Kalinova R, Gergova R, Popkirov G, Dikov C, Sendova-Vassileva M. Flexible Polymer-Organic Solar Cells Based on P3HT:PCBM Bulk Heterojunction Active Layer Constructed under Environmental Conditions. Molecules 2021; 26:molecules26226890. [PMID: 34833981 PMCID: PMC8623872 DOI: 10.3390/molecules26226890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/08/2021] [Accepted: 11/12/2021] [Indexed: 11/16/2022] Open
Abstract
In this study, some crucial parameters were determined of flexible polymer–organic solar cells prepared from an active layer blend of poly(3-hexylthiophene) (P3HT) and the fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) mixed in 1:1 mass ratio and deposited from chlorobenzene solution by spin-coating on poly(ethylene terephthalate) (PET)/ITO substrates. Additionally, the positive effect of an electron transport layer (ETL) prepared from zinc oxide nanoparticles (ZnO np) on flexible photovoltaic elements’ performance and stability was investigated. Test devices with above normal architecture and silver back electrodes deposed by magnetron sputtering were constructed under environmental conditions. They were characterized by current-voltage (I–V) measurements, quantum efficiency, impedance spectroscopy, surface morphology, and time–degradation experiments. The control over morphology of active layer thin film was achieved by post-deposition thermal treatment at temperatures of 110–120 °C, which led to optimization of device morphology and electrical parameters. The impedance spectroscopy results of flexible photovoltaic elements were fitted using two R||CPE circuits in series. Polymer–organic solar cells prepared on plastic substrates showed comparable current–voltage characteristics and structural properties but need further device stability improvement according to traditionally constructed cells on glass substrates.
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Affiliation(s)
- Georgy Grancharov
- Institute of Polymers, Bulgarian Academy of Sciences, Akad. G. Bonchev St., Block 103-A, 1113 Sofia, Bulgaria; (M.-D.A.); (R.K.)
- Correspondence:
| | - Mariya-Desislava Atanasova
- Institute of Polymers, Bulgarian Academy of Sciences, Akad. G. Bonchev St., Block 103-A, 1113 Sofia, Bulgaria; (M.-D.A.); (R.K.)
| | - Radostina Kalinova
- Institute of Polymers, Bulgarian Academy of Sciences, Akad. G. Bonchev St., Block 103-A, 1113 Sofia, Bulgaria; (M.-D.A.); (R.K.)
| | - Rositsa Gergova
- Central Laboratory of Solar Energy and New Energy Sources, 72 Tzarigradsko Chaussee, 1784 Sofia, Bulgaria; (R.G.); (G.P.); (C.D.); (M.S.-V.)
| | - Georgi Popkirov
- Central Laboratory of Solar Energy and New Energy Sources, 72 Tzarigradsko Chaussee, 1784 Sofia, Bulgaria; (R.G.); (G.P.); (C.D.); (M.S.-V.)
| | - Christosko Dikov
- Central Laboratory of Solar Energy and New Energy Sources, 72 Tzarigradsko Chaussee, 1784 Sofia, Bulgaria; (R.G.); (G.P.); (C.D.); (M.S.-V.)
| | - Marushka Sendova-Vassileva
- Central Laboratory of Solar Energy and New Energy Sources, 72 Tzarigradsko Chaussee, 1784 Sofia, Bulgaria; (R.G.); (G.P.); (C.D.); (M.S.-V.)
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30
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Wei Y, Wei Z, Zheng X, Liu J, Chen Y, Su Y, Luo W, Peng G, Huang H, Cai W, Deng C, Zhang X, Qin S. Stress Effects on Temperature-Dependent In-Plane Raman Modes of Supported Monolayer Graphene Induced by Thermal Annealing. Nanomaterials (Basel) 2021; 11:nano11102751. [PMID: 34685191 PMCID: PMC8538804 DOI: 10.3390/nano11102751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/08/2021] [Accepted: 10/13/2021] [Indexed: 11/28/2022]
Abstract
The coupling strength between two-dimensional (2D) materials and substrate plays a vital role on thermal transport properties of 2D materials. Here we systematically investigate the influence of vacuum thermal annealing on the temperature-dependence of in-plane Raman phonon modes in monolayer graphene supported on silicon dioxide substrate via Raman spectroscopy. Intriguingly, raising the thermal annealing temperature can significantly enlarge the temperature coefficient of supported monolayer graphene. The derived temperature coefficient of G band remains mostly unchanged with thermal annealing temperature below 473 K, while it increases from −0.030 cm−1/K to −0.0602 cm−1/K with thermal annealing temperature ranging from 473 K to 773 K, suggesting the great impact of thermal annealing on thermal transport in supported monolayer graphene. Such an impact might reveal the vital role of coupling strength on phonon scattering and on the thermal transport property of supported monolayer graphene. To further interpret the thermal annealing mechanism, the compressive stress in supported monolayer graphene, which is closely related to coupling strength and is studied through the temperature-dependent Raman spectra. It is found that the variation tendency for compressive stress induced by thermal annealing is the same as that for temperature coefficient, implying the intense connection between compressive stress and thermal transport. Actually, 773 K thermal annealing can result in 2.02 GPa compressive stress on supported monolayer graphene due to the lattice mismatch of graphene and substrate. This study proposes thermal annealing as a feasible path to modulate the thermal transport in supported graphene and to design future graphene-based devices.
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Affiliation(s)
- Yuehua Wei
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China;
| | - Zhenhua Wei
- College of Arts and Sciences, National University of Defense Technology, Changsha 410073, China; (Z.W.); (W.L.); (G.P.)
| | - Xiaoming Zheng
- College of Physical Science and Technology, Xiamen University, Xiamen 361005, China; (X.Z.); (J.L.); (Y.C.); (Y.S.); (W.C.)
| | - Jinxin Liu
- College of Physical Science and Technology, Xiamen University, Xiamen 361005, China; (X.Z.); (J.L.); (Y.C.); (Y.S.); (W.C.)
| | - Yangbo Chen
- College of Physical Science and Technology, Xiamen University, Xiamen 361005, China; (X.Z.); (J.L.); (Y.C.); (Y.S.); (W.C.)
| | - Yue Su
- College of Physical Science and Technology, Xiamen University, Xiamen 361005, China; (X.Z.); (J.L.); (Y.C.); (Y.S.); (W.C.)
| | - Wei Luo
- College of Arts and Sciences, National University of Defense Technology, Changsha 410073, China; (Z.W.); (W.L.); (G.P.)
| | - Gang Peng
- College of Arts and Sciences, National University of Defense Technology, Changsha 410073, China; (Z.W.); (W.L.); (G.P.)
| | - Han Huang
- Hunan Key Laboratory of Super-Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, China;
| | - Weiwei Cai
- College of Physical Science and Technology, Xiamen University, Xiamen 361005, China; (X.Z.); (J.L.); (Y.C.); (Y.S.); (W.C.)
| | - Chuyun Deng
- College of Arts and Sciences, National University of Defense Technology, Changsha 410073, China; (Z.W.); (W.L.); (G.P.)
- Correspondence: (C.D.); (X.Z.); (S.Q.)
| | - Xueao Zhang
- College of Physical Science and Technology, Xiamen University, Xiamen 361005, China; (X.Z.); (J.L.); (Y.C.); (Y.S.); (W.C.)
- Correspondence: (C.D.); (X.Z.); (S.Q.)
| | - Shiqiao Qin
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China;
- Correspondence: (C.D.); (X.Z.); (S.Q.)
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31
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Chueca de Bruijn A, Gómez-Gras G, Pérez MA. A Comparative Analysis of Chemical, Thermal, and Mechanical Post-Process of Fused Filament Fabricated Polyetherimide Parts for Surface Quality Enhancement. Materials (Basel) 2021; 14:5880. [PMID: 34640277 DOI: 10.3390/ma14195880] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/22/2021] [Accepted: 10/05/2021] [Indexed: 11/17/2022]
Abstract
Additive manufacturing technologies are increasingly being used in production systems because they shorten product development time and production cost, but surface integrity remains a limitation to meet the standards set by conventional manufacturing. In this research article, two chemical, one thermal, and three mechanical finishing operations are proposed to post-process fused filament fabricated Ultem 9085 parts. Their effects on the parts' surface quality and dimensional accuracy (changes in their width, height, length, and mass) are examined through optical and electron scanning microscopy, and the advantages and disadvantages of each method are discussed. Microscope evaluation has proven to be a powerful tool to observe apparent differences and understand the nature of different morphological changes. Results indicate that chemical and thermal treatments and ball burnishing are good candidates to significantly enhance the finish of the parts, despite requiring the use of solvents or provoking dimensional changes to the parts. The effects of abrasive mechanical treatments are more moderate at a macroscopic scale, but the surface of the filaments suffers the most remarkable changes.
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32
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Yang S, Jiao S, Lu H, Liu S, Nie Y, Gao S, Wang D, Wang J. Morphology evolution and enhanced broadband photoresponse behavior of two-dimensional Bi 2Te 3nanosheets. Nanotechnology 2021; 32:435707. [PMID: 34284363 DOI: 10.1088/1361-6528/ac1631] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Accepted: 07/19/2021] [Indexed: 06/13/2023]
Abstract
Bismuth telluride (Bi2Te3), as an emerging two-dimensional (2D) material, has attracted extensive attention from scientific researchers due to its excellent optoelectronic, thermoelectric properties and topological structure. However, the application research of Bi2Te3mainly focuses on thermoelectric devices, while the research on optoelectronic devices is scarce. In this work, the morphology evolution and growth mechanism of 2D Bi2Te3nanosheets with a thickness of 12 ± 3 nm were systematically studied by solvothermal method. Then, the Bi2Te3nanosheets were annealed at 350 °C for 1 h and applied to self-powered photoelectrochemical-type broadband photodetectors. Compared with the as-synthesized Bi2Te3photodetector, the photocurrent of the photodetector based on the annealed Bi2Te3is significantly enhanced, especially enhanced by 18.3 times under near-infrared light illumination. Furthermore, the performance of annealed Bi2Te3photodetector was systematically studied. The research results show that the photodetector not only has a broadband response from ultraviolet to near-infrared (365-850 nm) under zero bias voltage, but also obtains the highest responsivity of 6.6 mA W-1under green light with an incident power of 10 mW cm-2. The corresponding rise time and decay time are 17 ms and 20 ms, respectively. These findings indicate that annealed Bi2Te3nanosheets have great potential to be used as self-powered high-speed broadband photodetectors with high responsivity.
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Affiliation(s)
- Song Yang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China
| | - Shujie Jiao
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China
| | - Hongliang Lu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China
| | - Shuo Liu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China
| | - Yiyin Nie
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China
| | - Shiyong Gao
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China
| | - Dongbo Wang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China
| | - Jinzhong Wang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China
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33
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Zhang Y, Moon SK. The Effect of Annealing on Additive Manufactured ULTEM ™ 9085 Mechanical Properties. Materials (Basel) 2021; 14:ma14112907. [PMID: 34071471 PMCID: PMC8199117 DOI: 10.3390/ma14112907] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 05/24/2021] [Accepted: 05/26/2021] [Indexed: 12/03/2022]
Abstract
Fused filament fabrication (FFF) is increasingly adopted for direct manufacturing of end use parts in an aviation industry. However, the application of FFF technique is still restricted to manufacturing low criticality lightly loaded parts, due to poor mechanical performance. To alleviate the mechanical performance issue, thermal annealing process is frequently utilized. However, problems such as distortion issues and the need for jigs and fixtures limit the effectiveness of the thermal annealing process, especially for low volume complex FFF parts. In this research, a novel low temperature thermal annealing is proposed to address the limitations in conventional annealing. A modified orthogonal array design is applied to investigate the performance of ULTEM™ 9085 FFF coupons. Further, the coupons are annealed with specialized support structures, which are co-printed with the coupons during the manufacturing process. Once the annealing process is completed, multiscale characterizations are performed to identify the mechanical properties of the specimens. Geometrical measurement of post annealed specimens indicates an expansion in the layering direction, which indicates relief of thermal stresses. Moreover, annealed coupons show an improvement in tensile strength and reduction in strain concentration. Mesostructure and fracture surface analysis indicate an increase in ductility and enhanced coalescence. This research shows that the proposed annealing methodology can be applied to enhance the mechanical performance of FFF parts without significant distortion.
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34
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Fan X, Du P, Ma X, Wang R, Ma J, Wang Y, Fan D, Long Y, Deng B, Huang K, Wu H. Mechanochemical Synthesis of Pt/Nb 2CT x MXene Composites for Enhanced Electrocatalytic Hydrogen Evolution. Materials (Basel) 2021; 14:2426. [PMID: 34066611 PMCID: PMC8124981 DOI: 10.3390/ma14092426] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/28/2021] [Accepted: 04/28/2021] [Indexed: 11/28/2022]
Abstract
Production of hydrogen from water splitting has been considered as a promising solution for energy conversion and storage. Since a noble metal-based structure is still the most satisfactory but scarce kind of catalyst, it is significant to allow for practical application of such catalysts by engineering the heterogeneous structure and developing green and facile synthetic strategies. Herein, we report a mechanochemical ball milling synthesis of platinum nanoclusters immobilized on a 2D transition metal carbide MXene (Nb2CTx) as an enhanced catalyst for hydrogen evolution. After annealing at 600 °C, ultrafine Pt3Nb nanoclusters are formed on the Pt/Nb2CTx catalyst. As prepared, the Pt/Nb2CTx-600 catalyst demonstrates superior electrochemical HER activity and stability with an ultralow overpotential of 5 mV and 46 mV to achieve 10 mA cm-2 and 100 mA cm-2, respectively, in comparison with other Nb2CTx-based catalysts and commercial Pt/C catalysts. Moreover, the remarkable durability is also confirmed by accelerated durability tests (ADTs) and long-term chronoamperometry (CA) tests. The excellent HER performance was attributed to high Pt dispersion and more active site exposure by the mechanochemical process and thermal treatment. Such results suggest that the mechanochemical strategy provides a novel approach for rational design and cost-effective production of electrocatalysts, also providing other potential applications in a wide range of areas.
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Affiliation(s)
- Xiaoyuan Fan
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; (X.F.); (P.D.); (X.M.); (R.W.); (J.M.); (Y.W.); (D.F.)
| | - Peng Du
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; (X.F.); (P.D.); (X.M.); (R.W.); (J.M.); (Y.W.); (D.F.)
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials, Science and Engineering, Tsinghua University, Beijing 100084, China; (Y.L.); (B.D.)
| | - Xiaoxuan Ma
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; (X.F.); (P.D.); (X.M.); (R.W.); (J.M.); (Y.W.); (D.F.)
| | - Ruyue Wang
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; (X.F.); (P.D.); (X.M.); (R.W.); (J.M.); (Y.W.); (D.F.)
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials, Science and Engineering, Tsinghua University, Beijing 100084, China; (Y.L.); (B.D.)
| | - Jingteng Ma
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; (X.F.); (P.D.); (X.M.); (R.W.); (J.M.); (Y.W.); (D.F.)
| | - Yonggang Wang
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; (X.F.); (P.D.); (X.M.); (R.W.); (J.M.); (Y.W.); (D.F.)
| | - Dongyu Fan
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; (X.F.); (P.D.); (X.M.); (R.W.); (J.M.); (Y.W.); (D.F.)
| | - Yuanzheng Long
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials, Science and Engineering, Tsinghua University, Beijing 100084, China; (Y.L.); (B.D.)
| | - Bohan Deng
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials, Science and Engineering, Tsinghua University, Beijing 100084, China; (Y.L.); (B.D.)
| | - Kai Huang
- State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; (X.F.); (P.D.); (X.M.); (R.W.); (J.M.); (Y.W.); (D.F.)
| | - Hui Wu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials, Science and Engineering, Tsinghua University, Beijing 100084, China; (Y.L.); (B.D.)
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35
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Toso S, Baranov D, Altamura D, Scattarella F, Dahl J, Wang X, Marras S, Alivisatos AP, Singer A, Giannini C, Manna L. Multilayer Diffraction Reveals That Colloidal Superlattices Approach the Structural Perfection of Single Crystals. ACS Nano 2021; 15:6243-6256. [PMID: 33481560 PMCID: PMC8155329 DOI: 10.1021/acsnano.0c08929] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 01/13/2021] [Indexed: 05/06/2023]
Abstract
Colloidal superlattices are fascinating materials made of ordered nanocrystals, yet they are rarely called "atomically precise". That is unsurprising, given how challenging it is to quantify the degree of structural order in these materials. However, once that order crosses a certain threshold, the constructive interference of X-rays diffracted by the nanocrystals dominates the diffraction pattern, offering a wealth of structural information. By treating nanocrystals as scattering sources forming a self-probing interferometer, we developed a multilayer diffraction method that enabled the accurate determination of the nanocrystal size, interparticle spacing, and their fluctuations for samples of self-assembled CsPbBr3 and PbS nanomaterials. The multilayer diffraction method requires only a laboratory-grade diffractometer and an open-source fitting algorithm for data analysis. The average nanocrystal displacement of 0.33 to 1.43 Å in the studied superlattices provides a figure of merit for their structural perfection and approaches the atomic displacement parameters found in traditional crystals.
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Affiliation(s)
- Stefano Toso
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- International
Doctoral Program in Science, Università
Cattolica del Sacro Cuore, 25121 Brescia, Italy
| | - Dmitry Baranov
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Davide Altamura
- Istituto
di Cristallografia - Consiglio Nazionale delle Ricerche (IC−CNR), Via Amendola 122/O, I-70126 Bari, Italy
| | - Francesco Scattarella
- Istituto
di Cristallografia - Consiglio Nazionale delle Ricerche (IC−CNR), Via Amendola 122/O, I-70126 Bari, Italy
| | - Jakob Dahl
- Department
of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
- Materials
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
| | - Xingzhi Wang
- Department
of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
- Materials
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
| | - Sergio Marras
- Materials
Characterization Facility, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - A. Paul Alivisatos
- Department
of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
- Materials
Sciences Division, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
- Department
of Materials Science and Engineering, University
of California Berkeley, Berkeley, California 94720, United States
- Kavli
Energy NanoScience Institute, Berkeley, California 94720, United States
| | - Andrej Singer
- Department
of Materials Science and Engineering, Cornell
University, Ithaca, New York 14850, United States
| | - Cinzia Giannini
- Istituto
di Cristallografia - Consiglio Nazionale delle Ricerche (IC−CNR), Via Amendola 122/O, I-70126 Bari, Italy
| | - Liberato Manna
- Nanochemistry
Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
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36
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Toso S, Baranov D, Altamura D, Scattarella F, Dahl J, Wang X, Marras S, Alivisatos AP, Singer A, Giannini C, Manna L. Multilayer Diffraction Reveals That Colloidal Superlattices Approach the Structural Perfection of Single Crystals. ACS Nano 2021; 15:6243-6256. [PMID: 33481560 DOI: 10.26434/chemrxiv.13103507.v1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Colloidal superlattices are fascinating materials made of ordered nanocrystals, yet they are rarely called "atomically precise". That is unsurprising, given how challenging it is to quantify the degree of structural order in these materials. However, once that order crosses a certain threshold, the constructive interference of X-rays diffracted by the nanocrystals dominates the diffraction pattern, offering a wealth of structural information. By treating nanocrystals as scattering sources forming a self-probing interferometer, we developed a multilayer diffraction method that enabled the accurate determination of the nanocrystal size, interparticle spacing, and their fluctuations for samples of self-assembled CsPbBr3 and PbS nanomaterials. The multilayer diffraction method requires only a laboratory-grade diffractometer and an open-source fitting algorithm for data analysis. The average nanocrystal displacement of 0.33 to 1.43 Å in the studied superlattices provides a figure of merit for their structural perfection and approaches the atomic displacement parameters found in traditional crystals.
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Affiliation(s)
- Stefano Toso
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
- International Doctoral Program in Science, Università Cattolica del Sacro Cuore, 25121 Brescia, Italy
| | - Dmitry Baranov
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Davide Altamura
- Istituto di Cristallografia - Consiglio Nazionale delle Ricerche (IC-CNR), Via Amendola 122/O, I-70126 Bari, Italy
| | - Francesco Scattarella
- Istituto di Cristallografia - Consiglio Nazionale delle Ricerche (IC-CNR), Via Amendola 122/O, I-70126 Bari, Italy
| | - Jakob Dahl
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Xingzhi Wang
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Sergio Marras
- Materials Characterization Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - A Paul Alivisatos
- Department of Chemistry, University of California Berkeley, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department of Materials Science and Engineering, University of California Berkeley, Berkeley, California 94720, United States
- Kavli Energy NanoScience Institute, Berkeley, California 94720, United States
| | - Andrej Singer
- Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14850, United States
| | - Cinzia Giannini
- Istituto di Cristallografia - Consiglio Nazionale delle Ricerche (IC-CNR), Via Amendola 122/O, I-70126 Bari, Italy
| | - Liberato Manna
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
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37
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Sajjad MT, Bansal AK, Antolini F, Preis E, Stroea L, Toffanin S, Muccini M, Ortolani L, Migliori A, Allard S, Scherf U, Samuel IDW. Development of Quantum Dot (QD) Based Color Converters for Multicolor Display. Nanomaterials (Basel) 2021; 11:1089. [PMID: 33922440 DOI: 10.3390/nano11051089] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 04/09/2021] [Accepted: 04/15/2021] [Indexed: 11/17/2022]
Abstract
Many displays involve the use of color conversion layers. QDs are attractive candidates as color converters because of their easy processability, tuneable optical properties, high photoluminescence quantum yield, and good stability. Here, we show that emissive QDs with narrow emission range can be made in-situ in a polymer matrix, with properties useful for color conversion. This was achieved by blending the blue-emitting pyridine based polymer with a cadmium selenide precursor and baking their films at different temperatures. To achieve efficient color conversion, blend ratio and baking temperature/time were varied. We found that thermal decomposition of the precursor leads to highly emissive QDs whose final size and emission can be controlled using baking temperature/time. The formation of the QDs inside the polymer matrix was confirmed through morphological studies using atomic force microscopy (AFM) and transmission electron microscopy (TEM). Hence, our approach provides a cost-effective route to making highly emissive color converters for multi-color displays.
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38
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Wind L, Sistani M, Song Z, Maeder X, Pohl D, Michler J, Rellinghaus B, Weber WM, Lugstein A. Monolithic Metal-Semiconductor-Metal Heterostructures Enabling Next-Generation Germanium Nanodevices. ACS Appl Mater Interfaces 2021; 13:12393-12399. [PMID: 33683092 PMCID: PMC7975277 DOI: 10.1021/acsami.1c00502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Accepted: 02/23/2021] [Indexed: 06/12/2023]
Abstract
Low-dimensional Ge is perceived as a promising building block for emerging optoelectronic devices. Here, we present a wafer-scale platform technology enabling monolithic Al-Ge-Al nanostructures fabricated by a thermally induced Al-Ge exchange reaction. Transmission electron microscopy confirmed the purity and crystallinity of the formed Al segments with an abrupt interface to the remaining Ge segment. In good agreement with the theoretical value of bulk Al-Ge Schottky junctions, a barrier height of 200 ± 20 meV was determined. Photoluminescence and μ-Raman measurements proved the optical quality of the Ge channel embedded in the monolithic Al-Ge-Al heterostructure. Together with the wafer-scale accessibility, the proposed fabrication scheme may give rise to the development of key components of a broad spectrum of emerging Ge-based devices requiring monolithic metal-semiconductor-metal heterostructures with high-quality interfaces.
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Affiliation(s)
- Lukas Wind
- Institute
of Solid State Electronics, Technische Universität
Wien, Gußhausstraße 25-25a, Vienna 1040, Austria
| | - Masiar Sistani
- Institute
of Solid State Electronics, Technische Universität
Wien, Gußhausstraße 25-25a, Vienna 1040, Austria
| | - Zehao Song
- Institute
of Solid State Electronics, Technische Universität
Wien, Gußhausstraße 25-25a, Vienna 1040, Austria
| | - Xavier Maeder
- Swiss
Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, Thun 3602, Switzerland
| | - Darius Pohl
- Dresden
Center for Nanoanalysis, Technische Universität
Dresden, Helmholtzstraße
18, Dresden 01069, Germany
| | - Johann Michler
- Swiss
Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures, Feuerwerkerstrasse 39, Thun 3602, Switzerland
| | - Bernd Rellinghaus
- Dresden
Center for Nanoanalysis, Technische Universität
Dresden, Helmholtzstraße
18, Dresden 01069, Germany
| | - Walter M. Weber
- Institute
of Solid State Electronics, Technische Universität
Wien, Gußhausstraße 25-25a, Vienna 1040, Austria
| | - Alois Lugstein
- Institute
of Solid State Electronics, Technische Universität
Wien, Gußhausstraße 25-25a, Vienna 1040, Austria
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39
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Romano V, Najafi L, Sutanto AA, Schileo G, Queloz V, Bellani S, Prato M, Marras S, Nazeeruddin MK, D'Angelo G, Bonaccorso F, Grancini G. Two-Step Thermal Annealing: An Effective Route for 15 % Efficient Quasi-2D Perovskite Solar Cells. Chempluschem 2021; 86:1044-1048. [PMID: 33665981 DOI: 10.1002/cplu.202000777] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/18/2021] [Indexed: 01/09/2023]
Abstract
Low-dimensional perovskites (LDP) are nowadays recognized as promising materials for the realization of highly performing photovoltaic cells. However, issues related to film morphology, composition, crystal quality and material homogeneity limit the device performances and reproducibility. In this work, we implement a robust method for the deposition of a LDP mixing methylammonium (MA) and phenylethylammonium (PEA) cations to create the mixed system (PEA)2 MA39 Pb40 I121 by using a two-step thermal annealing treatment (at 60 and 100 °C). Our approach results in LDP films with high crystal quality and enhanced carrier lifetime, which double the power conversion efficiency of reference devices, reaching up to 15 %.
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Affiliation(s)
- Valentino Romano
- Department MIFT, University of Messina, Viale F. Stagno d'Alcontres 31, S. Agata, 98166, Messina, Italy
| | - Leyla Najafi
- Graphene Labs, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
- BeDimensional Spa, Via Lungotorrente Secca 3D, 16163, Genova, Italy
| | - Albertus Adrian Sutanto
- Group of molecular Engineering of Functional Materials Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Valais Wallis, Rue de l'Industrie 17, Sion, CH-1951, Switzerland
| | - Giorgio Schileo
- Department of Chemistry and INSTM, University of Pavia, Via Taramelli 14, 27100, Pavia, Italy
| | - Valentin Queloz
- Group of molecular Engineering of Functional Materials Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Valais Wallis, Rue de l'Industrie 17, Sion, CH-1951, Switzerland
| | - Sebastiano Bellani
- Graphene Labs, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
- BeDimensional Spa, Via Lungotorrente Secca 3D, 16163, Genova, Italy
| | - Mirko Prato
- Materials Characterization Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Sergio Marras
- Materials Characterization Facility, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
| | - Mohammad Khaja Nazeeruddin
- Group of molecular Engineering of Functional Materials Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Valais Wallis, Rue de l'Industrie 17, Sion, CH-1951, Switzerland
| | - Giovanna D'Angelo
- Department MIFT, University of Messina, Viale F. Stagno d'Alcontres 31, S. Agata, 98166, Messina, Italy
| | - Francesco Bonaccorso
- Graphene Labs, Istituto Italiano di Tecnologia, Via Morego 30, 16163, Genova, Italy
- BeDimensional Spa, Via Lungotorrente Secca 3D, 16163, Genova, Italy
| | - Giulia Grancini
- Department of Chemistry and INSTM, University of Pavia, Via Taramelli 14, 27100, Pavia, Italy
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Sala F, Paié P, Martínez Vázquez R, Osellame R, Bragheri F. Effects of Thermal Annealing on Femtosecond Laser Micromachined Glass Surfaces. Micromachines (Basel) 2021; 12:180. [PMID: 33670373 PMCID: PMC7918068 DOI: 10.3390/mi12020180] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 02/02/2021] [Accepted: 02/07/2021] [Indexed: 02/07/2023]
Abstract
Femtosecond laser micromachining (FLM) of fused silica allows for the realization of three-dimensional embedded optical elements and microchannels with micrometric feature size. The performances of these components are strongly affected by the machined surface quality and residual roughness. The polishing of 3D buried structures in glass was demonstrated using different thermal annealing processes, but precise control of the residual roughness obtained with this technique is still missing. In this work, we investigate how the FLM irradiation parameters affect surface roughness and we characterize the improvement of surface quality after thermal annealing. As a result, we achieved a strong roughness reduction, from an average value of 49 nm down to 19 nm. As a proof of concept, we studied the imaging performances of embedded mirrors before and after thermal polishing, showing the capacity to preserve a minimum feature size of the reflected image lower than μ5μm. These results allow for us to push forward the capabilities of this enabling fabrication technology, and they can be used as a starting point to improve the performances of more complex optical elements, such as hollow waveguides or micro-lenses.
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Affiliation(s)
- Federico Sala
- Department of Physics, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy; (F.S.); (R.O.)
- Istituto di Fotonica e Nanotecnologie, CNR, Piazza Leonardo da Vinci 32, 20133 Milano, Italy; (R.M.V.); (F.B.)
| | - Petra Paié
- Istituto di Fotonica e Nanotecnologie, CNR, Piazza Leonardo da Vinci 32, 20133 Milano, Italy; (R.M.V.); (F.B.)
| | - Rebeca Martínez Vázquez
- Istituto di Fotonica e Nanotecnologie, CNR, Piazza Leonardo da Vinci 32, 20133 Milano, Italy; (R.M.V.); (F.B.)
| | - Roberto Osellame
- Department of Physics, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy; (F.S.); (R.O.)
- Istituto di Fotonica e Nanotecnologie, CNR, Piazza Leonardo da Vinci 32, 20133 Milano, Italy; (R.M.V.); (F.B.)
| | - Francesca Bragheri
- Istituto di Fotonica e Nanotecnologie, CNR, Piazza Leonardo da Vinci 32, 20133 Milano, Italy; (R.M.V.); (F.B.)
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Magén C, Pablo-Navarro J, De Teresa JM. Focused-Electron-Beam Engineering of 3D Magnetic Nanowires. Nanomaterials (Basel) 2021; 11:nano11020402. [PMID: 33557442 PMCID: PMC7914621 DOI: 10.3390/nano11020402] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/27/2021] [Accepted: 01/30/2021] [Indexed: 11/25/2022]
Abstract
Focused-electron-beam-induced deposition (FEBID) is the ultimate additive nanofabrication technique for the growth of 3D nanostructures. In the field of nanomagnetism and its technological applications, FEBID could be a viable solution to produce future high-density, low-power, fast nanoelectronic devices based on the domain wall conduit in 3D nanomagnets. While FEBID has demonstrated the flexibility to produce 3D nanostructures with almost any shape and geometry, the basic physical properties of these out-of-plane deposits are often seriously degraded from their bulk counterparts due to the presence of contaminants. This work reviews the experimental efforts to understand and control the physical processes involved in 3D FEBID growth of nanomagnets. Co and Fe FEBID straight vertical nanowires have been used as benchmark geometry to tailor their dimensions, microstructure, composition and magnetism by smartly tuning the growth parameters, post-growth purification treatments and heterostructuring.
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Affiliation(s)
- César Magén
- Instituto de Nanociencia y Materiales de Aragón (INMA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain; (J.P.-N.); (J.M.D.T.)
- Laboratorio de Microscopías Avanzadas (LMA), Universidad de Zaragoza, 50018 Zaragoza, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain
- Correspondence: ; Tel.: +34-876-555369; Fax: +34-976-762-776
| | - Javier Pablo-Navarro
- Instituto de Nanociencia y Materiales de Aragón (INMA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain; (J.P.-N.); (J.M.D.T.)
- Laboratorio de Microscopías Avanzadas (LMA), Universidad de Zaragoza, 50018 Zaragoza, Spain
- Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
| | - José María De Teresa
- Instituto de Nanociencia y Materiales de Aragón (INMA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain; (J.P.-N.); (J.M.D.T.)
- Laboratorio de Microscopías Avanzadas (LMA), Universidad de Zaragoza, 50018 Zaragoza, Spain
- Departamento de Física de la Materia Condensada, Universidad de Zaragoza, 50009 Zaragoza, Spain
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Lu X, Kang L, Yan B, Lei T, Zheng G, Xie H, Sun J, Jiang K. Evolution of a Superhydrophobic H59 Brass Surface by Using Laser Texturing via Post Thermal Annealing. Micromachines (Basel) 2020; 11:mi11121057. [PMID: 33260379 PMCID: PMC7760971 DOI: 10.3390/mi11121057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 11/25/2020] [Accepted: 11/26/2020] [Indexed: 06/12/2023]
Abstract
To fabricate an industrial and highly efficient super-hydrophobic brass surface, annealed H59 brass samples have here been textured by using a 1064 nm wavelength nanosecond fiber laser. The effects of different laser parameters (such as laser fluence, scanning speed, and repetition frequency), on the translation to super-hydrophobic surfaces, have been of special interest to study. As a result of these studies, hydrophobic properties, with larger water contact angles (WCA), were observed to appear faster than for samples that had not been heat-treated (after an evolution time of 4 days). This wettability transition, as well as the evolution of surface texture and nanograins, were caused by thermal annealing treatments, in combination with laser texturing. At first, the H59 brass samples were annealed in a Muffle furnace at temperatures of 350 °C, 600 °C, and 800 °C. As a result of these treatments, there were rapid formations of coarse surface morphologies, containing particles of both micro/nano-level dimensions, as well as enlarged distances between the laser-induced grooves. A large number of nanograins were formed on the brass metal surfaces, onto which an increased number of exceedingly small nanoparticles were attached. This combination of fine nanoparticles, with a scattered distribution of nanograins, created a hierarchic Lotus leaf-like morphology containing both micro-and nanostructured material (i.e., micro/nanostructured material). Furthermore, the distances between the nano-clusters and the size of nano-grains were observed, analyzed, and strongly coupled to the wettability transition time. Hence, the formation and evolution of functional groups on the brass surfaces were influenced by the micro/nanostructure formations on the surfaces. As a direct consequence, the surface energies became reduced, which affected the speed of the wettability transition-which became enhanced. The micro/nanostructures on the H59 brass surfaces were analyzed by using Field Emission Scanning Electron Microscopy (FESEM). The chemical compositions of these surfaces were characterized by using an Energy Dispersive Analysis System (EDS). In addition to the wettability, the surface energy was thereby analyzed with respect to the different surface micro/nanostructures as well as to the roughness characteristics. This study has provided a facile method (with an experimental proof thereof) by which it is possible to construct textured H59 brass surfaces with tunable wetting behaviors. It is also expected that these results will effectively extend the industrial applications of brass material.
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Affiliation(s)
- Xizhao Lu
- College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China; (L.K.); (B.Y.); (T.L.)
- Department of Electronic Science, Xiamen University, Xiamen 361005, China
| | - Lei Kang
- College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China; (L.K.); (B.Y.); (T.L.)
- Fujian Key Laboratory of Special Energy Manufacturing, Huaqiao University, Xiamen 361021, China
| | - Binggong Yan
- College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China; (L.K.); (B.Y.); (T.L.)
| | - Tingping Lei
- College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China; (L.K.); (B.Y.); (T.L.)
| | - Gaofeng Zheng
- Department of Mechanical Engineering, Xiamen University, Xiamen 361005, China;
| | - Haihe Xie
- Department of Mechanical Engineering, Putian University, Putian 361110, China;
| | - Jingjing Sun
- School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China;
| | - Kaiyong Jiang
- College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China; (L.K.); (B.Y.); (T.L.)
- Fujian Key Laboratory of Special Energy Manufacturing, Huaqiao University, Xiamen 361021, China
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Jaekel A, Lill P, Whitelam S, Saccà B. Insights into the Structure and Energy of DNA Nanoassemblies. Molecules 2020; 25:E5466. [PMID: 33255286 DOI: 10.3390/molecules25235466] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/14/2020] [Accepted: 11/16/2020] [Indexed: 11/16/2022] Open
Abstract
Since the pioneering work of Ned Seeman in the early 1980s, the use of the DNA molecule as a construction material experienced a rapid growth and led to the establishment of a new field of science, nowadays called structural DNA nanotechnology. Here, the self-recognition properties of DNA are employed to build micrometer-large molecular objects with nanometer-sized features, thus bridging the nano- to the microscopic world in a programmable fashion. Distinct design strategies and experimental procedures have been developed over the years, enabling the realization of extremely sophisticated structures with a level of control that approaches that of natural macromolecular assemblies. Nevertheless, our understanding of the building process, i.e., what defines the route that goes from the initial mixture of DNA strands to the final intertwined superstructure, is, in some cases, still limited. In this review, we describe the main structural and energetic features of DNA nanoconstructs, from the simple Holliday junction to more complicated DNA architectures, and present the theoretical frameworks that have been formulated until now to explain their self-assembly. Deeper insights into the underlying principles of DNA self-assembly may certainly help us to overcome current experimental challenges and foster the development of original strategies inspired to dissipative and evolutive assembly processes occurring in nature.
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Helsper EA, Frantz LM, Adams JM, Morris HA, Hearon BF. Arthroscopic thermal stabilization for distal radioulnar joint instability: 3 to 19 years follow-up. J Hand Surg Eur Vol 2020; 45:916-922. [PMID: 32515266 DOI: 10.1177/1753193420927882] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
This retrospective study investigated the clinical outcomes of patients treated for chronic distal radioulnar joint instability with arthroscopic thermal annealing of the superficial radioulnar ligaments, ulnar palmar wrist ligaments, and dorsoulnar wrist capsule using a radiofrequency probe. Sixty patients (62 wrists) were treated over an 18-year period. At mean follow-up of 10 years (range 3 to 19), 30 of 33 patients were satisfied with their surgical outcomes. There were statistically significant improvements in ulnar-sided wrist pain on a visual analogue scale and in distal radioulnar joint stability on the dorsopalmar stress test after surgery compared with preoperative status. The modified Mayo Wrist Score and Quick Disabilities of the Arm, Shoulder, and Hand score of the patients were favourable. Early failure occurred in 11 of 62 wrists. Nine of these 11 wrists needed a secondary procedure. We conclude that arthroscopic thermal shrinkage is effective for the majority of the patients with mild to moderate chronic distal radioulnar joint instability in long-term follow-up. Secondary open ligament reconstruction is an option in the case of early failure.Level of evidence: IV.
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Affiliation(s)
- Elizabeth A Helsper
- Department of Orthopaedic Surgery, University of Kansas School of Medicine, Wichita, KS, USA
| | - Lisa M Frantz
- Department of Orthopaedic Surgery, University of Kansas School of Medicine, Wichita, KS, USA
| | | | - Harry A Morris
- Department of Orthopaedic Surgery, University of Kansas School of Medicine, Wichita, KS, USA.,Advanced Orthopaedics Associates, 2778 N. Webb Road, Wichita, KS, USA
| | - Bernard F Hearon
- Department of Orthopaedic Surgery, University of Kansas School of Medicine, Wichita, KS, USA.,Advanced Orthopaedics Associates, 2778 N. Webb Road, Wichita, KS, USA
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Qahtan TF, Gondal MA, Dastageer MA, Kwon G, Ezazi M, Al-Kuban MZ. Thermally Sensitized Membranes for Crude Oil-Water Remediation under Visible Light. ACS Appl Mater Interfaces 2020; 12:48572-48579. [PMID: 33074661 DOI: 10.1021/acsami.0c13888] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Effective remediation of produced water requires separating crude oil-water mixture and removing the dissolved organic pollutants. Membranes with selective wettability for water over oil enable the gravity-driven separation of an oil-water mixture by allowing water to permeate through while repelling oil. However, these membranes are often limited by their inability to remove the dissolved organic pollutants. In this work, a membrane with in-air superhydrophilic and underwater superoleophobic wettability is fabricated by thermal annealing of a stainless steel mesh. The resulting membrane possesses a hierarchical surface texture covered with a photocatalytic oxide layer composed of iron oxide and chromium oxide. The membrane exhibits chemical and mechanical robustness, which makes it suitable for remediation of crude oil and water mixture. Further, after being fouled by crude oil, the membrane can recover its inherent water-rich permeate flux upon visible light irradiation. Finally, the membrane demonstrates that it can separate surfactant-stabilized crude oil-in-water emulsion under gravity and decontaminate water-rich permeate by photocatalytic degradation of dissolved organic pollutants upon continuous irradiation of visible light.
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Affiliation(s)
- Talal F Qahtan
- Laser Research Group Physics Department & Center of Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - Mohammed A Gondal
- Laser Research Group Physics Department & Center of Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - Mohamed A Dastageer
- Laser Research Group Physics Department & Center of Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
| | - Gibum Kwon
- Department of Mechanical Engineering, University of Kansas, Lawrence, Kansas 66045, United States
| | - Mohammadamin Ezazi
- Department of Mechanical Engineering, University of Kansas, Lawrence, Kansas 66045, United States
| | - Mohammed Z Al-Kuban
- Laser Research Group Physics Department & Center of Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
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46
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Lee S, Kim M, Baek G, Kim HM, Van TTN, Gwak D, Heo K, Shong B, Park JS. Thermal Annealing of Molecular Layer-Deposited Indicone Toward Area-Selective Atomic Layer Deposition. ACS Appl Mater Interfaces 2020; 12:43212-43221. [PMID: 32841556 DOI: 10.1021/acsami.0c10322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Area-selective atomic layer deposition (AS-ALD) is a promising technique for fine nanoscale patterning, which may overcome the drawbacks of conventional top-down approaches for the fabrication of future electronic devices. However, conventional materials and processes often employed for AS-ALD are inadequate for conformal and rapid processing. We introduce a new strategy for AS-ALD based on molecular layer deposition (MLD) that is compatible with large-scale manufacturing. Conformal thin films of "indicone" (indium alkoxide polymer) are fabricated by MLD using INCA-1 (bis(trimethylsily)amidodiethylindium) and HQ (hydroquinone). Then, the MLD indicone films are annealed by a thermal heat treatment under vacuum. The properties of the indicone thin films with different annealing temperatures were measured with multiple optical, physical, and chemical techniques. Interestingly, a nearly complete removal of indium from the film was observed upon annealing to ca. 450 °C and above. The chemical mechanism of the thermal transformation of the indicone film was investigated by density functional theory calculations. Then, the annealed indicone thin films were applied as an inhibiting layer for the subsequent ALD of ZnO, where the deposition of approximately 20 ALD cycles (equivalent to a thickness of approximately 4 nm) of ZnO was successfully inhibited. Finally, patterns of annealed MLD indicone/Si substrates were created on which the area-selective deposition of ZnO was demonstrated.
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Affiliation(s)
- Seunghwan Lee
- Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Miso Kim
- Department of Chemical Engineering, Hongik University, 94 Wausan-ro, Mapo-gu, Seoul 04066, Republic of Korea
| | - GeonHo Baek
- Division of Nano-Scale Semiconductor Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Hye-Mi Kim
- Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Tran Thi Ngoc Van
- Department of Chemical Engineering, Hongik University, 94 Wausan-ro, Mapo-gu, Seoul 04066, Republic of Korea
| | - Dham Gwak
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of Korea
| | - Kwang Heo
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Neungdong-ro, Gwangjin-gu, Seoul 05006, Republic of Korea
| | - Bonggeun Shong
- Department of Chemical Engineering, Hongik University, 94 Wausan-ro, Mapo-gu, Seoul 04066, Republic of Korea
| | - Jin-Seong Park
- Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
- Division of Nano-Scale Semiconductor Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
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Deng S, Li R, Park JE, Guan J, Choo P, Hu J, Smeets PJM, Odom TW. Ultranarrow plasmon resonances from annealed nanoparticle lattices. Proc Natl Acad Sci U S A 2020; 117:23380-23384. [PMID: 32900952 PMCID: PMC7519217 DOI: 10.1073/pnas.2008818117] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
This paper reports how the spectral linewidths of plasmon resonances can be narrowed down to a few nanometers by optimizing the morphology, surface roughness, and crystallinity of metal nanoparticles (NPs) in two-dimensional (2D) lattices. We developed thermal annealing procedures to achieve ultranarrow surface lattice resonances (SLRs) with full-width at half-maxima linewidths as narrow as 4 nm from arrays of Au, Ag, Al, and Cu NPs. Besides annealing, we developed a chemical vapor deposition process to use Cu NPs as catalytic substrates for graphene growth. Graphene-encapsulated Cu NPs showed the narrowest SLR linewidths (2 nm) and were stable for months. These ultranarrow SLR nanocavity modes supported even narrower lasing emission spectra and high nonlinearity in the input-output light-light curves.
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Affiliation(s)
- Shikai Deng
- Department of Chemistry, Northwestern University, Evanston, IL 60208
| | - Ran Li
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
| | - Jeong-Eun Park
- Department of Chemistry, Northwestern University, Evanston, IL 60208
| | - Jun Guan
- Graduate Program in Applied Physics, Northwestern University, Evanston, IL 60208
| | - Priscilla Choo
- Department of Chemistry, Northwestern University, Evanston, IL 60208
| | - Jingtian Hu
- Department of Chemistry, Northwestern University, Evanston, IL 60208
| | | | - Teri W Odom
- Department of Chemistry, Northwestern University, Evanston, IL 60208;
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
- Graduate Program in Applied Physics, Northwestern University, Evanston, IL 60208
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Liang YC, Hung CS, Zhao WC. Thermal Annealing Induced Controllable Porosity and Photoactive Performance of 2D ZnO Sheets. Nanomaterials (Basel) 2020; 10:E1352. [PMID: 32664463 PMCID: PMC7407819 DOI: 10.3390/nano10071352] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 07/08/2020] [Accepted: 07/08/2020] [Indexed: 01/29/2023]
Abstract
Porous ZnO sheets containing various degrees of a nanoscaled pore were successfully synthesized using a simple hydrothermal method and various postannealing procedures. The porosity features of the ZnO sheets can be easily tuned by changing both the annealing temperature and annealing atmosphere. The dense porous nature of ZnO sheets is beneficial to enhance light absorption. Moreover, the substantially increased oxygen vacancies in the ZnO sheets were observed especially after the hydrogen treatment as revealed in the X-ray photoelectron spectroscope and photoluminescence analyses. The high density of surface crystal defect enhanced the photoinduced electron-hole separation rate of the ZnO sheets, which is crucial for an improved photoactivity. The porous ZnO sheets formed at a hydrogen atmosphere exhibited superior photoactive performance than the porous ZnO sheets formed at the high-temperature ambient air annealing. The dense pores and massive crystal defects formed by a hydrogen atmosphere annealing in the ZnO crystals might account for the observed photoactive behaviors in this study.
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Affiliation(s)
- Yuan-Chang Liang
- Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 20224, Taiwan; (C.-S.H.); (W.-C.Z.)
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Tian L, Zhang W, Huang Y, Wen F, Yu H, Li Y, Wang Q, Peng C, Ma Z, Hu T, Du L, Zhang M. Effects of Annealing Time on Triple Cation Perovskite Films and Their Solar Cells. ACS Appl Mater Interfaces 2020; 12:29344-29356. [PMID: 32510925 DOI: 10.1021/acsami.0c06558] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Cesium (Cs) contained triple-cation and mixed halide perovskite (CsFAMA) is broadly employed as light absorption layers for efficient and stable perovskite solar cells (PSCs) fabrication with high reproducibility. On the other hand, thermal annealing is a universal post-treatment method for perovskite films preparation. Moreover, thermal management highly depends on perovskite materials. However, no specialized study has been reported on CsFAMA perovskite to date. Herein, we have systematically investigated the influence of thermal annealing and annealing time on CsFAMA films and their solar cells. We demonstrated that heating time of 45 or 60 min at 100 °C is desirable. More interestingly, we found that the unannealed CsFAMA films exhibit ultrahigh photoluminescence (PL) intensities, much stronger than that of annealed films. Note that PL intensities gradually weaken as a function of annealing time. In particular, the PL intensities of fresh films (after antisolvent dripping) are at least 200 times higher than that of 60 min annealed films. To our knowledge, it is the first time to report this PL behavior. We speculate that it is due to quantum confinement effect of perovskite crystal nuclei and "cage effect" of DMSO intermediates in the fresh films. To this point, the unannealed CsFAMA films may have great potential in PL emission applications.
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Affiliation(s)
- Liuwen Tian
- Institute of Photovoltaic, Southwest Petroleum University, Chengdu 610500, China
| | - Wenfeng Zhang
- Institute of Photovoltaic, Southwest Petroleum University, Chengdu 610500, China
| | - Yuelong Huang
- Institute of Photovoltaic, Southwest Petroleum University, Chengdu 610500, China
| | - Fang Wen
- Institute of Photovoltaic, Southwest Petroleum University, Chengdu 610500, China
| | - Hua Yu
- Institute of Photovoltaic, Southwest Petroleum University, Chengdu 610500, China
| | - Yuepeng Li
- Institute of Photovoltaic, Southwest Petroleum University, Chengdu 610500, China
| | - Qiyun Wang
- Institute of Photovoltaic, Southwest Petroleum University, Chengdu 610500, China
| | - Changtao Peng
- Institute of Photovoltaic, Southwest Petroleum University, Chengdu 610500, China
| | - Zhu Ma
- Institute of Photovoltaic, Southwest Petroleum University, Chengdu 610500, China
| | - Taotao Hu
- Institute of Photovoltaic, Southwest Petroleum University, Chengdu 610500, China
| | - Lin Du
- Institute of Photovoltaic, Southwest Petroleum University, Chengdu 610500, China
| | - Meng Zhang
- Institute of Photovoltaic, Southwest Petroleum University, Chengdu 610500, China
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Zhu J, Zhang J, Jiang H, Zhu J, Zhu S, Li M, Ji B, Zhao J. Interface Study on the Effect of Carbon and Boron Carbide Diffusion Barriers in Sc/Si Multilayer System. ACS Appl Mater Interfaces 2020; 12:25400-25408. [PMID: 32364697 DOI: 10.1021/acsami.0c03563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Sc/Si multilayers are one of the promising material combinations commonly used in the spectral range of 35-50 nm. However, diffusion and silicidation at the interfaces of Sc/Si multilayers limit widespread applications of this material combination. To improve the properties of Sc/Si multilayers, the scheme of barrier layers is utilized. In this work, a series of Sc/Si multilayers with boron carbide and carbon barrier layers were designed and fabricated to compare the properties including interface quality and thermal stability. The effect on the multilayer structure and quality before and after annealing were investigated by using grazing-incidence X-ray reflection, X-ray diffraction, rocking-curve X-ray diffuse scattering, transmission electron microscopy, and selected area electron diffraction. The results indicate that severe interdiffusion and crystallization occur in the multilayer with a carbon barrier after annealing. However, a boron carbide barrier layer improves thermal stability up to 550 °C since the interfaces remain abrupt and clear after annealing. The multilayer quality is confirmed to be improved significantly.
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Affiliation(s)
- Jingtao Zhu
- MOE Key Laboratory of Advanced Micro-structured Materials, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
| | - Jiayi Zhang
- MOE Key Laboratory of Advanced Micro-structured Materials, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
| | - Hui Jiang
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Zhangheng Road 239, Pudong District, Shanghai 201204, China
| | - Jie Zhu
- MOE Key Laboratory of Advanced Micro-structured Materials, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
| | - Shengming Zhu
- MOE Key Laboratory of Advanced Micro-structured Materials, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
| | - Miao Li
- MOE Key Laboratory of Advanced Micro-structured Materials, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
| | - Bin Ji
- MOE Key Laboratory of Advanced Micro-structured Materials, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
| | - Jiaoling Zhao
- Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
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