201
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Jin B, Hejazi S, Pyczak F, Oehring M, Mohajernia S, Kment S, Tomanec O, Zboril R, Nguyen NT, Yang M, Schmuki P. Amorphous Mo-Ta Oxide Nanotubes for Long-Term Stable Mo Oxide-Based Supercapacitors. ACS Appl Mater Interfaces 2019; 11:45665-45673. [PMID: 31714052 DOI: 10.1021/acsami.9b15958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
With a large-scale usage of portable electric appliances, a high demand for increasingly high-density energy storage devices has emerged. MoO3 has, in principle, a large potential as a negative electrode material in supercapacitive devices due to high charge densities that can be obtained from its reversible redox reactions. Nevertheless, the extremely poor electrochemical stability of MoO3 in aqueous electrolytes prevents a practical use in high capacitance devices. In this work, we describe how to overcome this severe stability issue by forming amorphous molybdenum oxide/tantalum oxide nanotubes by anodic oxidation of a Mo-Ta alloy. The presence of a critical amount of Ta oxide (>20 at. %) prevents the electrochemical decay of the MoO3 phase and thus yields an extremely high stability. Due to the protection provided by tantalum oxide, no capacitance losses are measureable after 10,000 charging/discharging cycles.
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Affiliation(s)
- Bowen Jin
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin 150001 , PR China
- Department of Materials Science, Institute for Surface Science and Corrosion WW4-LKO , University of Erlangen-Nuremberg , Martensstraße 7 , D-91058 Erlangen , Germany
| | - Seyedsina Hejazi
- Department of Materials Science, Institute for Surface Science and Corrosion WW4-LKO , University of Erlangen-Nuremberg , Martensstraße 7 , D-91058 Erlangen , Germany
| | - Florian Pyczak
- Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH , Max-Planck-Straße 1 , 21502 Geesthacht , Germany
| | - Michael Oehring
- Helmholtz-Zentrum Geesthacht, Zentrum für Material- und Küstenforschung GmbH , Max-Planck-Straße 1 , 21502 Geesthacht , Germany
| | - Shiva Mohajernia
- Department of Materials Science, Institute for Surface Science and Corrosion WW4-LKO , University of Erlangen-Nuremberg , Martensstraße 7 , D-91058 Erlangen , Germany
| | - Stepan Kment
- Regional Centre of Advanced Technologies and Materials , Palacky University Olomouc , 17. Listopadu 50A , 772 07 Olomouc , Czech Republic
| | - Ondrej Tomanec
- Regional Centre of Advanced Technologies and Materials , Palacky University Olomouc , 17. Listopadu 50A , 772 07 Olomouc , Czech Republic
| | - Radek Zboril
- Regional Centre of Advanced Technologies and Materials , Palacky University Olomouc , 17. Listopadu 50A , 772 07 Olomouc , Czech Republic
| | - Nhat Truong Nguyen
- Department of Materials Science, Institute for Surface Science and Corrosion WW4-LKO , University of Erlangen-Nuremberg , Martensstraße 7 , D-91058 Erlangen , Germany
| | - Min Yang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering , Harbin Institute of Technology , Harbin 150001 , PR China
| | - Patrik Schmuki
- Department of Materials Science, Institute for Surface Science and Corrosion WW4-LKO , University of Erlangen-Nuremberg , Martensstraße 7 , D-91058 Erlangen , Germany
- Regional Centre of Advanced Technologies and Materials , Palacky University Olomouc , 17. Listopadu 50A , 772 07 Olomouc , Czech Republic
- Department of Chemistry , King Abdulaziz University , Jeddah , Saudi Arabia
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202
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Li X, Xiong H, Jia Q. A Versatile Solvent-Induced Polymerization Strategy To Synthesize Free-Standing Porous Polymer Nanosheets and Nanotubes for Fast Iodine Capture. ACS Appl Mater Interfaces 2019; 11:46205-46211. [PMID: 31730328 DOI: 10.1021/acsami.9b17202] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Two-dimensional (2D) porous polymers have demonstrated great potential in gas capture and surface catalysis as well as energy storage and conversion. Current synthesis of 2D porous polymers strongly depends on the usage of templates or an additional exfoliation process. The resultant products have uncontrollable morphology and structure, low structure integrity, and relatively low yield. Herein, a facile and high-throughput solvent-induced polymerization strategy to prepare ultrathin free-standing 2D porous hyper-cross-linked polymer nanosheets with large surface area and high sulfur content by cross-linking steric hexakis(benzylthio)benzene and thiophene is reported. Using this approach, the morphologies (nanosheets and nanotubes) and specific surface areas (658-1150 m2 g-1) of porous hyper-cross-linked polymers can be simply tailored by adjusting the cross-linking degree between monomers. The as-synthesized porous hyper-cross-linked polymer nanotubes exhibit promising iodine capture performance, including a superior iodine uptake capacity (∼270 wt %) and a rapid equilibrium adsorption (within 60 min). This method will pave a new avenue for the synthesis of advanced 2D porous polymers for various applications.
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Affiliation(s)
- Xuemei Li
- College of Chemistry , Jilin University , Changchun 130012 , China
| | - Hailong Xiong
- College of Chemistry , Jilin University , Changchun 130012 , China
| | - Qiong Jia
- College of Chemistry , Jilin University , Changchun 130012 , China
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203
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Cosert KM, Castro-Forero A, Steidl RJ, Worden RM, Reguera G. Bottom-Up Fabrication of Protein Nanowires via Controlled Self-Assembly of Recombinant Geobacter Pilins. mBio 2019; 10:e02721-19. [PMID: 31822587 PMCID: PMC6904877 DOI: 10.1128/mbio.02721-19] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 10/23/2019] [Indexed: 12/18/2022] Open
Abstract
Metal-reducing bacteria in the genus Geobacter use a complex protein apparatus to guide the self-assembly of a divergent type IVa pilin peptide and synthesize conductive pilus appendages that show promise for the sustainable manufacturing of protein nanowires. The preferential helical conformation of the Geobacter pilin, its high hydrophobicity, and precise distribution of charged and aromatic amino acids are critical for biological self-assembly and conductivity. We applied this knowledge to synthesize via recombinant methods truncated pilin peptides for the bottom-up fabrication of protein nanowires and identified rate-limiting steps of pilin nucleation and fiber elongation that control assembly efficiency and nanowire length, respectively. The synthetic fibers retained the biochemical and electronic properties of the native pili even under chemical fixation, a critical consideration for integration of the nanowires into electronic devices. The implications of these results for the design and mass production of customized protein nanowires for diverse applications are discussed.IMPORTANCE The discovery in 2005 of conductive protein appendages (pili) in the metal-reducing bacterium Geobacter sulfurreducens challenged our understanding of biological electron transfer and pioneered studies in electromicrobiology that revealed the electronic basis of many microbial metabolisms and interactions. The protein nature of the pili afforded opportunities for engineering novel conductive peptides for the synthesis of nanowires via cost-effective and scalable manufacturing approaches. However, methods did not exist for efficient production, purification, and in vitro assembly of pilins into nanowires. Here we describe platforms for high-yield recombinant synthesis of Geobacter pilin derivatives and their assembly as protein nanowires with biochemical and electronic properties rivaling those of the native pili. The bottom-up fabrication of protein nanowires exclusively from pilin building blocks confirms unequivocally the charge transport capacity of the peptide assembly and establishes the intellectual foundation needed to manufacture pilin-based nanowires in bioelectronics and other applications.
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Affiliation(s)
- K M Cosert
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, Michigan, USA
| | | | - Rebecca J Steidl
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, Michigan, USA
| | - Robert M Worden
- Department of Chemical Engineering, Michigan State University, East Lansing, Michigan, USA
| | - G Reguera
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, Michigan, USA
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204
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Cirtoaje C, Petrescu E. The Influence of Single-Walled Carbon Nanotubes on the Dynamic Properties of Nematic Liquid Crystals in Magnetic Field. Materials (Basel) 2019; 12:E4031. [PMID: 31817251 PMCID: PMC6947598 DOI: 10.3390/ma12244031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 11/05/2019] [Revised: 11/27/2019] [Accepted: 11/29/2019] [Indexed: 11/23/2022]
Abstract
This article aims to study the impact of carbon nanotube dispersions in liquid crystals. A theoretical model for the system's dynamics is presented, considering the elastic continuum theory and a planar alignment of liquid crystal molecules on the nanotube's surface. Experimental calculation of the relaxation times in the magnetic field was made for two cases: when the field was switched on (τon), and when it was switched off (τoff). The results indicate an increase of the relaxation time by about 25% when the magnetic field was switched off, and a smaller increase (about 10%) when the field was switched on, where both were in good agreement with the theoretical values.
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Affiliation(s)
| | - Emil Petrescu
- Department of Physics, Faculty of Applied Science, University Politehnica of Bucharest, Bucharest RO-060042, Romania;
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205
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Wang J, Zhuang G, Chen M, Lu D, Li Z, Huang Q, Jia H, Cui S, Shao X, Yang S, Du P. Selective Synthesis of Conjugated Chiral Macrocycles: Sidewall Segments of (-)/(+)-(12,4) Carbon Nanotubes with Strong Circularly Polarized Luminescence. Angew Chem Int Ed Engl 2019; 59:1619-1626. [PMID: 31710148 DOI: 10.1002/anie.201909401] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [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: 07/26/2019] [Revised: 10/21/2019] [Indexed: 01/04/2023]
Abstract
Carbon nanotubes (CNTs) have unusual physical properties that are valuable for nanotechnology and electronics, but the chemical synthesis of chirality- and diameter-specific CNTs and π-conjugated CNT segments is still a great challenge. Reported here are the selective syntheses, isolations, characterizations, and photophysical properties of two novel chiral conjugated macrocycles ([4]cyclo-2,6-anthracene; [4]CAn2,6 ), as (-)/(+)-(12,4) carbon nanotube segments. These conjugated macrocyclic molecules were obtained using a bottom-up assembly approach and subsequent reductive elimination reaction. The hoop-shaped molecules can be directly viewed by a STM technique. In addition, chiral enantiomers with (-)/(+) helicity of the [4]CAn2,6 were successfully isolated by HPLC. The new tubular CNT segments exhibit large absorption and photoluminescence redshifts compared to the monomer unit. The carbon enantiomers are also observed to show strong circularly polarized luminescence (glum ≈0.1). The results reported here expand the scope of materials design for bottom-up synthesis of chiral macrocycles and enrich existing knowledge of their optoelectronic properties.
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Affiliation(s)
- Jinyi Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei, Anhui Province, 230026, China
| | - Guilin Zhuang
- College of Chemical Engineering, Zhejiang University of Technology, 18, Chaowang Road, Hangzhou, Zhejiang Province, 310032, China
| | - Muqing Chen
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei, Anhui Province, 230026, China
| | - Dapeng Lu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei, Anhui Province, 230026, China
| | - Zhe Li
- Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui Province, 230026, China
| | - Qiang Huang
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei, Anhui Province, 230026, China
| | - Hongxing Jia
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei, Anhui Province, 230026, China
| | - Shengsheng Cui
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei, Anhui Province, 230026, China
| | - Xiang Shao
- Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui Province, 230026, China
| | - Shangfeng Yang
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei, Anhui Province, 230026, China
| | - Pingwu Du
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei, Anhui Province, 230026, China
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206
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Du Z, Fu D, Teng J, Wang L, Gao F, Yang W, Zhang H, Fang X. CsPbI 3 Nanotube Photodetectors with High Detectivity. Small 2019; 15:e1905253. [PMID: 31769610 DOI: 10.1002/smll.201905253] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 11/07/2019] [Indexed: 06/10/2023]
Abstract
In the present work, the exploration of photodetectors (PDs) based on CsPbI3 nanotubes are reported. The as-prepared CsPbI3 nanotubes can be stable for more than 2 months under air conditions. It is found that, in comparison to the nanowires, nanobelts, and nanosheets, the nanotubes can be advantageous to be used as the functional units for PDs, which is mainly attributed to the enhanced light absorption ability induced by the light trapping effect within the tube cavity. As a proof of concept, the as-constructed PDs based on CsPbI3 nanotube present an overall excellent performance with a responsivity (Rλ ), external quantum efficiency (EQE) and detectivity of 1.84 × 103 A W-1 , 5.65 × 105 % and 9.99 × 1013 Jones, respectively, which are all comparable to state-of-the-art ones for all-inorganic perovskite PDs.
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Affiliation(s)
- Zhentao Du
- College of Materials Science and Engineering, Hunan University, Changsha, 410082, P. R. China
- Institute of Materials, Ningbo University of Technology, Ningbo, 315016, P. R. China
| | - Dingfa Fu
- College of Materials Science and Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Jie Teng
- College of Materials Science and Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Lin Wang
- Institute of Materials, Ningbo University of Technology, Ningbo, 315016, P. R. China
| | - Fengmei Gao
- Institute of Materials, Ningbo University of Technology, Ningbo, 315016, P. R. China
| | - Weiyou Yang
- Institute of Materials, Ningbo University of Technology, Ningbo, 315016, P. R. China
| | - Hui Zhang
- College of Materials Science and Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Xiaosheng Fang
- Department of Materials Science, Fudan University, Shanghai, 200433, P. R. China
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207
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Ahmed F, Pervez SA, Aljaafari A, Alshoaibi A, Abuhimd H, Oh J, Koo BH. Fabrication of TiO 2-Nanotube-Array-Based Supercapacitors. Micromachines (Basel) 2019; 10:E742. [PMID: 31683615 DOI: 10.3390/mi10110742] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 10/10/2019] [Accepted: 10/26/2019] [Indexed: 11/17/2022]
Abstract
In this work, a simple and cost-effective electrochemical anodization technique was adopted to rapidly grow TiO2 nanotube arrays on a Ti current collector and to utilize the synthesized materials as potential electrodes for supercapacitors. To accelerate the growth of the TiO2 nanotube arrays, lactic acid was used as an electrolyte additive. The as-prepared TiO2 nanotube arrays with a high aspect ratio were strongly adhered to the Ti substrate. X-ray diffraction (XRD) and transmission electron microscopy (TEM) results confirmed that the TiO2 nanotube arrays were crystallized in the anatase phase. TEM images confirmed the nanotublar-like morphology of the TiO2 nanotubes, which had a tube length and a diameter of ~16 and ~80 nm, respectively. The electrochemical performance of the TiO2 nanotube array electrodes was evaluated using the cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge/discharge (GCD) measurements. Excellent electrochemical response was observed for the electrodes based on the TiO2 nanotube arrays, as the cells delivered a high specific capacitance of 5.12 mF/cm2 at a scan rate of 100 mV/s and a current density of 100 µA/cm2. The initial capacity was maintained for more than 250 cycles. Further, a remarkable rate capability response was observed, as the cell retained 88% of the initial areal capacitance when the scan rate was increased from 10 to 500 mV/s. The results suggest the suitability of TiO2 nanotube arrays as electrode materials for commercial supercapacitor applications.
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208
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Moon SY, Kim WS. The Synergistic Effect of a Bimetallic Catalyst for the Synthesis of Carbon Nanotube Aerogels and their Predominant Chirality. Chemistry 2019; 25:13635-13639. [PMID: 31407390 DOI: 10.1002/chem.201903273] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 07/18/2019] [Revised: 08/07/2019] [Indexed: 11/07/2022]
Abstract
Synthesis of continuous spinnable carbon nanotube (CNT) fibers is the most promising method for producing CNT fibers for commercial applications. The floating-catalyst chemical vapor deposition (FC-CVD) method is a rapid process that achieves catalyst formation, CNT nucleation and growth, and aerogel-like sock formation within a few seconds. However, the formation mechanism is unknown. Herein, the progress of CNT fiber formation with bimetallic catalysts was studied, and the effect of catalyst composition to CNT fiber synthesis and their structural properties was investigated. In the case of bimetallic catalysts, the carbon source rapidly decomposes and generates various secondary hydrocarbon species, such as CH4 , C2 H4 , C2 H2 , C3 H6 , and C4 H10 whereas monometallic catalysts generate only CH4 and C2 H4 on decomposition. CNT fiber formation with Fe1 Ni0 begins about 400 mm from the reactor entrance, whereas CNT formation with Fe0.8 Ni0.2 and Fe0.5 Ni0.5 begins at about 500 and 300 mm, respectively. The formed CNT bundles and individual CNTs are oriented along the gas flow at these locations. The enhanced rate of fiber formation and lowering of growth temperature associated with bimetallic catalysts is explained by the synergistic effects between the two metals. The synthesized CNTs become predominantly semiconducting with increasing Ni contents.
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Affiliation(s)
- Sook Young Moon
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Chudong-ro 92, Bongdong-eup, Wanju-gun, Jeonbuk, 55324, Republic of Korea
| | - Woo Sik Kim
- Ceramic Fiber & Composite Center, Korea Institute of Ceramic Engineering & Technology, 101 Soho-ro, Jinju-si, Gyeongsangnam-do, 52851, Republic of Korea
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209
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Song W, Zhang Y, Varyambath A, Kim I. Guided Assembly of Well-Defined Hierarchical Nanoporous Polymers by Lewis Acid-Base Interactions. ACS Nano 2019; 13:11753-11769. [PMID: 31560521 DOI: 10.1021/acsnano.9b05727] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Three-dimensional hierarchical nanoporous polymers and carbon nanomaterials with well-defined superstructures are of great interest for various intelligent applications, whereas a facile and versatile approach to access those materials with a high surface area, stable well-defined morphology, and ordered pores still remains a significant challenge. Herein, we report a self-regulated Lewis acid-base interaction-mediated assembly strategy for the in situ synthesis of morphology-engineered hyper-cross-linked porous polymers and carbon materials. A series of functionalized aromatic compounds (FAC) is subjected to self-cross-linking via classic Friedel-Crafts chemistry to achieve stable porous polymers with a high surface area. Varying the monomer/catalyst combination had a dramatic effect on the acid-base interaction, facilitating the tailoring of the self-assembled morphologies from nanotubes to hollow nanospheres, and even nanosheets. A mechanistic study showed that the byproducts generated during cross-linking orchestrate the interactions between the catalyst (acid) and FAC (base) and simultaneously drive the self-assembly to yield specific morphologies. Based on the rigid hollow polymer framework and intrinsic hydroxyl functionality, the hyper-cross-linked hollow nanospheres were easily transformed to an acid-functionalized catalyst for efficient biodiesel production. Moreover, high-quality porous carbonaceous nanocounterparts such as carbon nanotubes, hollow carbon nanospheres, and carbon nanosheets could also be produced by direct pyrolysis of the corresponding polymer precursors. These findings may provide guidance for the facile design of morphology-controlled functionalized polymers and carbon nanomaterials for various applications.
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Affiliation(s)
- Wenliang Song
- BK21 PLUS Center for Advanced Chemical Technology, Department of Polymer Science and Engineering , Pusan National University , Pusan 609-735 , Republic of Korea
| | - Yu Zhang
- BK21 PLUS Center for Advanced Chemical Technology, Department of Polymer Science and Engineering , Pusan National University , Pusan 609-735 , Republic of Korea
| | - Anuraj Varyambath
- BK21 PLUS Center for Advanced Chemical Technology, Department of Polymer Science and Engineering , Pusan National University , Pusan 609-735 , Republic of Korea
| | - Il Kim
- BK21 PLUS Center for Advanced Chemical Technology, Department of Polymer Science and Engineering , Pusan National University , Pusan 609-735 , Republic of Korea
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210
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Soares P, Dias-Netipanyj MF, Elifio-Esposito S, Leszczak V, Popat K. Effects of calcium and phosphorus incorporation on the properties and bioactivity of TiO 2 nanotubes. J Biomater Appl 2019; 33:410-421. [PMID: 30223734 DOI: 10.1177/0885328218797549] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 12/13/2022]
Abstract
In this study, we investigate the formation of calcium and phosphorus-doped TiO2 nanotubes, produced by potentiostatic anodization of Ti in viscous electrolyte-containing HF and Ca/P ions. Characterization of the produced oxide layer was conducted using scanning electron microscopy, glancing-angle X-ray diffraction, X-ray photoelectron spectroscopy, contact angle, and protein adsorption measurements. Adipose-derived stem cells were used to study material cytotoxicity, cell viability and proliferation, and cell morphology and growth. To evaluate the adipose-derived stem-cell differentiation, we investigated the expression of osteocalcin and osteopontin by cells as well as calcium mineralization. Results show that it was possible to produce a superhydrophilic titanium oxide nanotube layer with incorporation of Ca and P ions. The presence of Ca and P in the oxide layer not only improved the cell adhesion and proliferation but also stimulated the production of key marker proteins indicating differentiation of cells.
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Affiliation(s)
- Paulo Soares
- 1 Pontificia Universidade Catolica do Parana, Curitiba, Paraná, Brazil
| | | | | | | | - Ketul Popat
- 2 Colorado State University, Fort Collins, Colorado, USA
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211
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Qorbani M, Khajehdehi O, Sabbah A, Naseri N. Ti-rich TiO 2 Tubular Nanolettuces by Electrochemical Anodization for All-Solid-State High-Rate Supercapacitor Devices. ChemSusChem 2019; 12:4064-4073. [PMID: 31267672 DOI: 10.1002/cssc.201901302] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 06/13/2019] [Indexed: 06/09/2023]
Abstract
Supercapacitors store charge by ion adsorption or fast redox reactions on the surface of porous materials. One of the bottlenecks in this field is the development of biocompatible and high-rate supercapacitor devices by scalable fabrication processes. Herein, a Ti-rich anatase TiO2 material that addresses the above-mentioned challenges is reported. Tubular nanolettuces were fabricated by a cost-effective and fast anodization process of Ti foil. They attained a large potential window of 2.5 V in a neutral electrolyte owing to the high activation energy for water splitting of the (1 0 1) facet. Aqueous and all-solid-state devices showed diffusion time constants of 46 and 1700 ms, as well as high maximum energy (power) densities of 0.844 (0.858) and 0.338 μWh cm-2 (0.925 mW cm-2 ), respectively. The all-solid-state device showed ultrahigh stability of 96 % in capacitance retention after 20 000 galvanostatic charge/discharge cycles. These results open an avenue to fabricate biochemically inert supercapacitor devices.
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Affiliation(s)
- Mohammad Qorbani
- Department of Physics, Sharif University of Technology, Tehran, 11155-9161, Iran
- Center for Condensed Matter Sciences (CCMS), National Taiwan University, Taipei, 10617, Taiwan
| | - Omid Khajehdehi
- Department of Physics, Sharif University of Technology, Tehran, 11155-9161, Iran
| | - Amr Sabbah
- Center for Condensed Matter Sciences (CCMS), National Taiwan University, Taipei, 10617, Taiwan
| | - Naimeh Naseri
- Department of Physics, Sharif University of Technology, Tehran, 11155-9161, Iran
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212
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Schirowski M, Hauke F, Hirsch A. Controlling the Degree of Functionalization: In-Depth Quantification and Side-Product Analysis of Diazonium Chemistry on SWCNTs. Chemistry 2019; 25:12761-12768. [PMID: 31298442 PMCID: PMC6790569 DOI: 10.1002/chem.201902330] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/01/2019] [Indexed: 11/07/2022]
Abstract
We present an in-depth qualitative and quantitative analysis of a reaction between 4-iodobenzenediazonium tetrafluoroborate and single-walled carbon nanotubes (SWCNTs) via thermogravimetric analysis coupled with mass spectrometry (TG-MS) or a gas chromatography and mass spectrometry (TG-GC-MS) as well as Raman spectroscopy. We propose a method for precise determination of the degree of functionalization and quantification of physisorbed aromates, detaching around their boiling point, alongside covalently bonded ones (cleavage over 200 °C). While the presence of some side products like phenol- or biphenyl species could be excluded, residual surfactant and minor amounts of benzene could be identified. A concentration-dependent experiment shows that the degree of functionalization increases with the logarithm of the concentration of applied diazonium salt, which can be exploited to precisely adjust the amount of aryl addends on the nanotube sidewall, up to 1 moiety per 100 carbon atoms.
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Affiliation(s)
- Milan Schirowski
- Joint Institute of Advanced Materials and Processes (ZMP)Friedrich-Alexander University of Erlangen-NürnbergDr.-Mack-Str. 8190762FürthGermany
- Chair of Organic Chemistry IIFriedrich-Alexander University of Erlangen-NürnbergNikolaus-Fiebiger-Str. 1091054ErlangenGermany
| | - Frank Hauke
- Joint Institute of Advanced Materials and Processes (ZMP)Friedrich-Alexander University of Erlangen-NürnbergDr.-Mack-Str. 8190762FürthGermany
- Chair of Organic Chemistry IIFriedrich-Alexander University of Erlangen-NürnbergNikolaus-Fiebiger-Str. 1091054ErlangenGermany
| | - Andreas Hirsch
- Joint Institute of Advanced Materials and Processes (ZMP)Friedrich-Alexander University of Erlangen-NürnbergDr.-Mack-Str. 8190762FürthGermany
- Chair of Organic Chemistry IIFriedrich-Alexander University of Erlangen-NürnbergNikolaus-Fiebiger-Str. 1091054ErlangenGermany
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213
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Matsuno T, Fukunaga K, Sato S, Isobe H. Retarded Solid-State Rotations of an Oval-Shaped Guest in a Deformed Cylinder with CH-π Arrays. Angew Chem Int Ed Engl 2019; 58:12170-12174. [PMID: 31270917 DOI: 10.1002/anie.201907040] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 06/06/2019] [Revised: 07/02/2019] [Indexed: 01/11/2023]
Abstract
Upon encapsulating an oval-shaped hydrocarbon guest, a cylindrical host deforms its shape to maximize intermolecular contacts. Structure-assembly relationship studies with a series of hydrocarbon guests disclosed the importance of molecular shapes and CH-π contacts. Multiple contacts and weak CH-π hydrogen bonds resulted in an optimal assembly; however, the shape deformation resulted in severe retardation of rotational motions in the crystal. Thus, unlike a circular guest, the oval-shaped guest did not change its orientation in the host. Unexpectedly, the planar guest did not affect the packing structure to form a double helix in intertwined host arrays.
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Affiliation(s)
- Taisuke Matsuno
- Department of Chemistry, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.,JST, ERATO, Isobe Degenerate π-Integration Project, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Kengo Fukunaga
- Department of Chemistry, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Sota Sato
- Department of Chemistry, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.,JST, ERATO, Isobe Degenerate π-Integration Project, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Hiroyuki Isobe
- Department of Chemistry, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.,JST, ERATO, Isobe Degenerate π-Integration Project, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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214
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Nagata M, Shukla S, Nakanishi Y, Liu Z, Lin YC, Shiga T, Nakamura Y, Koyama T, Kishida H, Inoue T, Kanda N, Ohno S, Sakagawa Y, Suenaga K, Shinohara H. Isolation of Single-Wired Transition-Metal Monochalcogenides by Carbon Nanotubes. Nano Lett 2019; 19:4845-4851. [PMID: 30798600 DOI: 10.1021/acs.nanolett.8b05074] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The successful isolation of single layers from two-dimensional (2D) van der Waals (vdW)-layered materials has opened new frontiers in condensed matter physics and materials science. Their discovery and unique properties laid the foundation for exploring 1D counterparts. However, the isolation of 1D vdW-wired materials has thus far remained a challenge, and effective techniques are demanded. Here we report the facile synthesis of isolated transition-metal monochalcogenide MoTe nanowires by using carbon nanotubes (CNTs) as molds. Individual nanowires are perfectly separated by CNTs with a minimal interaction, enabling detailed characterization of the single wires. Transmission electron microscopy revealed unusual torsional motion of MoTe nanowires inside CNTs. Confinement of 1D vdW-wired materials to the nanotest tubes might open up possibilities for exploring unprecedented properties of the nanowires and their potential applications such as electromechanical switching devices.
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Affiliation(s)
- Masataka Nagata
- Department of Chemistry , Nagoya University , Nagoya 464-8602 , Japan
| | - Shivani Shukla
- Department of Materials Science and Engineering , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213-3815 , United States
| | - Yusuke Nakanishi
- Department of Chemistry , Nagoya University , Nagoya 464-8602 , Japan
- Institute for Advanced Research , Nagoya University , Nagoya 464-8602 , Japan
- Department of Physics , Tokyo Metropolitan University , Tokyo 192-0397 , Japan
| | - Zheng Liu
- National Institute of Advanced Industrial Science and Technology (AIST) , Nagoya 463-8560 , Japan
- National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba 305-8565 , Japan
| | - Yung-Chang Lin
- National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba 305-8565 , Japan
| | - Takuma Shiga
- Department of Mechanical Engineering , The University of Tokyo , Tokyo 113-8656 , Japan
| | - Yuto Nakamura
- Department of Applied Physics , Nagoya University , Nagoya 464-8603 , Japan
| | - Takeshi Koyama
- Department of Applied Physics , Nagoya University , Nagoya 464-8603 , Japan
| | - Hideo Kishida
- Department of Applied Physics , Nagoya University , Nagoya 464-8603 , Japan
| | - Tsukasa Inoue
- Department of Chemistry , Nagoya University , Nagoya 464-8602 , Japan
| | - Naoyuki Kanda
- Department of Chemistry , Nagoya University , Nagoya 464-8602 , Japan
| | - Shun Ohno
- Gifu High School , Gifu 500-8889 , Japan
| | - Yuki Sakagawa
- Ichinomiya High School , Ichinomiya 491-8533 , Japan
| | - Kazu Suenaga
- National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba 305-8565 , Japan
| | - Hisanori Shinohara
- Department of Chemistry , Nagoya University , Nagoya 464-8602 , Japan
- Institute for Advanced Research , Nagoya University , Nagoya 464-8602 , Japan
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215
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Ji L, Zhou X, Schmuki P. Sulfur and Ti 3+ co-Doping of TiO 2 Nanotubes Enhance Photocatalytic H 2 Evolution Without the Use of Any co-catalyst. Chem Asian J 2019; 14:2724-2730. [PMID: 31188545 DOI: 10.1002/asia.201900532] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 04/22/2019] [Revised: 06/07/2019] [Indexed: 11/11/2022]
Abstract
TiO2 nanotubes were successfully co-doped with sulfur and Ti3+ states using a facile annealing treatment in H2 /H2 S gas mixture. The obtained nanotubes were investigated for their photocatalytic performance and characterized by SEM, XRD, XPS, EPR, IPCE, IMPS and Mott-Schottky measurements. The synthesized co-doped TiO2 nanotubes show an enhanced photocatalytic hydrogen production rate compared to tubes that were treated only in pure H2 or H2 S atmosphere-this without the presence of any co-catalyst. It was found that sulfur in co-doped TiO2 exists in the form of S2- and a small quantity of S4+ /S6+ , which leads to a narrowing of the band gap. However, the enhanced absorption of light in the visible range is not the key reason for the improved photocatalytic performance. We ascribe the enhanced photocatalytic activity to a synergetic effect of S mid-gap states and disordered Ti3+ defects that facilitate photo generated electron transfer.
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Affiliation(s)
- Lei Ji
- Department of Materials Science WW-4, LKO, University of Erlangen-Nuremberg, Martensstrasse 7, Erlangen, 91058, Germany.,College of Chemistry and Chemical Engineering, Northeast Petroleum University, Provincial Key Laboratory of Oil and Gas Chemical Technology, Daqing, 163318, China
| | - Xuemei Zhou
- Department of Materials Science WW-4, LKO, University of Erlangen-Nuremberg, Martensstrasse 7, Erlangen, 91058, Germany
| | - Patrik Schmuki
- Department of Materials Science WW-4, LKO, University of Erlangen-Nuremberg, Martensstrasse 7, Erlangen, 91058, Germany.,Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21569, Saudi Arabia
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216
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Afzal MJ, Pervaiz E, Farrukh S, Ahmed T, Bingxue Z, Yang M. Highly integrated nanocomposites of RGO/TiO 2 nanotubes for enhanced removal of microbes from water. Environ Technol 2019; 40:2567-2576. [PMID: 29493396 DOI: 10.1080/09593330.2018.1447021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 09/25/2017] [Accepted: 02/27/2018] [Indexed: 06/08/2023]
Abstract
Highly integrated nanocomposite of Graphene oxide (GO) and its derivatives with metal oxides is essential for enhanced performance for various applications. Tuning the morphology is an important aspect during nanomaterials synthesis; this has an amplifying influence upon physicochemical properties of advanced functional materials. In this research work, GO/TiO2 nanotube composites have been successfully synthesized via alkaline hydrothermal treatment method by augmenting GO layers with two different phases of TiO2 (anatase and rutile) nanoparticles, followed by the hydrothermal treatment that also have caused reduction of GO to reduced GO (RGO). The morphology of the as-prepared samples appeared to be nanotubes with a large aspect ratio (length to diameter). The synthesized materials have been characterized using various techniques to determine their morphological and functional properties. Large surface area (158 m2/g) nanotube composites found accountable as effective disinfectant for water containing microorganisms. The antimicrobial activity of the synthesized composites was examined by disk diffusion method and optical density for bacterial growth using two different bacterial species; Escherichia Coli (E.coli, Gram-negative) and Staphylococcus Aureus (Methicillin-resistant Staphylococcus aureus, Gram-positive). The antibacterial study revealed that, the anatase phase RGO/TiO2 nanotube composites manifested appreciable effect on both bacteria as compared to rutile phase RGO/TiO2 nanotubecomposite.
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Affiliation(s)
- Muhammad Junaid Afzal
- a Department of Chemical Engineering, School of Chemical & Materials Engineering (SCME), National University of Sciences & Technology (NUST) , Islamabad , Pakistan
| | - Erum Pervaiz
- a Department of Chemical Engineering, School of Chemical & Materials Engineering (SCME), National University of Sciences & Technology (NUST) , Islamabad , Pakistan
| | - Sarah Farrukh
- a Department of Chemical Engineering, School of Chemical & Materials Engineering (SCME), National University of Sciences & Technology (NUST) , Islamabad , Pakistan
| | - Tahir Ahmed
- b Atta-ur-Rahman School of Applied Biosciences (ASAB), National University of Sciences & Technology (NUST) , Islamabad , Pakistan
| | - Zhang Bingxue
- c Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences (CAS) , Ningbo , People's Republic of China
| | - Minghui Yang
- c Ningbo Institute of Materials Technology & Engineering (NIMTE), Chinese Academy of Sciences (CAS) , Ningbo , People's Republic of China
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217
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Jia N, Liu J, Gao Y, Chen P, Chen X, An Z, Li X, Chen Y. Graphene-Encapsulated Co 9 S 8 Nanoparticles on N,S-Codoped Carbon Nanotubes: An Efficient Bifunctional Oxygen Electrocatalyst. ChemSusChem 2019; 12:3390-3400. [PMID: 30895738 DOI: 10.1002/cssc.201900383] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Revised: 03/12/2019] [Indexed: 06/09/2023]
Abstract
An inexpensive and efficient bifunctional electrocatalyst for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) is central to the rechargeable zinc-air battery. Herein, a nanohybrid, in which N,S-codoped carbon nanotubes were decorated with Co9 S8 nanoparticles encapsulated in porous graphene layers, was fabricated by a one-step heat-treatment process. The N,S dopant species were the major active sites for the ORR, and Co9 S8 nanoparticles were mainly responsible for the OER. Compared with commercial 20 wt % Pt/C and Ir/C electrocatalysts, this nanohybrid exhibited a comparable ORR half-wave potential (0.831 V vs. reversible hydrogen electrode) and OER potential (1.591 V at 10 mA cm-2 ), better long-term stability in an alkaline medium, and a narrower potential gap (0.76 V) between ORR and OER. Furthermore, as air electrode of the rechargeable zinc-air battery, it delivered a low charge-discharge voltage gap (0.65 V at 5 mA cm-2 ), high open-circuit potential (1.539 V), good specific capacity (805 mA h g - 1 Zn at 5 mA cm-2 ), and excellent cycling stability (48 h), superior to those of commercial Pt/C and Ir/C catalysts, and thus showed promise for applications in renewable energy conversion devices.
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Affiliation(s)
- Nan Jia
- Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Jing Liu
- Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Yunshan Gao
- Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Pei Chen
- Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Xinbing Chen
- Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Zhongwei An
- Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Xifei Li
- Institute of Advanced Electrochemical Energy, Xi'an University of Technology, Xi'an, 710048, P. R. China
| | - Yu Chen
- Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
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218
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Moreno-Pescador G, Florentsen CD, Østbye H, Sønder SL, Boye TL, Veje EL, Sonne AK, Semsey S, Nylandsted J, Daniels R, Bendix PM. Curvature- and Phase-Induced Protein Sorting Quantified in Transfected Cell-Derived Giant Vesicles. ACS Nano 2019; 13:6689-6701. [PMID: 31199124 DOI: 10.1021/acsnano.9b01052] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Eukaryotic cells possess a dynamic network of membranes that vary in lipid composition. To perform numerous biological functions, cells modulate their shape and the lateral organization of proteins associated with membranes. The modulation is generally facilitated by physical cues that recruit proteins to specific regions of the membrane. Analyzing these cues is difficult due to the complexity of the membrane conformations that exist in cells. Here, we examine how different types of membrane proteins respond to changes in curvature and to lipid phases found in the plasma membrane. By using giant plasma membrane vesicles derived from transfected cells, the proteins were positioned in the correct orientation and the analysis was performed in plasma membranes with a biological composition. Nanoscale membrane curvatures were generated by extracting nanotubes from these vesicles with an optical trap. The viral membrane protein neuraminidase was not sensitive to curvature, but it did exhibit strong partitioning (coefficient of K = 0.16) disordered membrane regions. In contrast, the membrane repair protein annexin 5 showed a preference for nanotubes with a density up to 10-15 times higher than that on the more flat vesicle membrane. The investigation of nanoscale effects in isolated plasma membranes provides a quantitative platform for studying peripheral and integral membrane proteins in their natural environment.
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Affiliation(s)
| | | | - Henrik Østbye
- Department of Biochemistry and Biophysics , Stockholm University , 10691 Stockholm , Sweden
| | - Stine L Sønder
- Membrane Integrity Group, Unit for Cell Death and Metabolism, Center for Autophagy, Recycling and Disease , Danish Cancer Society Research Center , Strandboulevarden 49 , DK-2100 Copenhagen , Denmark
| | - Theresa L Boye
- Membrane Integrity Group, Unit for Cell Death and Metabolism, Center for Autophagy, Recycling and Disease , Danish Cancer Society Research Center , Strandboulevarden 49 , DK-2100 Copenhagen , Denmark
| | - Emilie L Veje
- Niels Bohr Institute , University of Copenhagen , DK-2100 Copenhagen , Denmark
| | - Alexander K Sonne
- Niels Bohr Institute , University of Copenhagen , DK-2100 Copenhagen , Denmark
| | - Szabolcs Semsey
- Niels Bohr Institute , University of Copenhagen , DK-2100 Copenhagen , Denmark
| | - Jesper Nylandsted
- Membrane Integrity Group, Unit for Cell Death and Metabolism, Center for Autophagy, Recycling and Disease , Danish Cancer Society Research Center , Strandboulevarden 49 , DK-2100 Copenhagen , Denmark
- Department of Cellular and Molecular Medicine, Faculty of Health Sciences , University of Copenhagen , DK-2200 Copenhagen N , Denmark
| | - Robert Daniels
- Department of Biochemistry and Biophysics , Stockholm University , 10691 Stockholm , Sweden
| | - Poul Martin Bendix
- Niels Bohr Institute , University of Copenhagen , DK-2100 Copenhagen , Denmark
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219
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Griffith AS, Zhang TD, Burkert SC, Adiguzel Z, Acilan C, Star A, Saunders WS. Characterizing the Cellular Response to Nitrogen-Doped Carbon Nanocups. Nanomaterials (Basel) 2019; 9:nano9060887. [PMID: 31208132 PMCID: PMC6631063 DOI: 10.3390/nano9060887] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 05/23/2019] [Revised: 06/06/2019] [Accepted: 06/07/2019] [Indexed: 12/11/2022]
Abstract
Carbon nanomaterials, specifically, carbon nanotubes (CNTs) have many potential applications in biology and medicine. Currently, this material has not reached its full potential for application due to the potential toxicity to mammalian cells, and the incomplete understanding of how CNTs interface with cells. The chemical composition and structural features of CNTs have been shown to directly affect their biological compatibility. The incorporation of nitrogen dopants to the graphitic lattice of CNTs results in a unique cup shaped morphology and minimal cytotoxicity in comparison to its undoped counterpart. In this study, we investigate how uniquely shaped nitrogen-doped carbon nanocups (NCNCs) interface with HeLa cells, a cervical cancer epithelial cultured cell line, and RPE-1 cells, an immortalized cultured epithelial cell line. We determined that NCNCs do not elicit a cytotoxic response in cells, and that they are uptaken via endocytosis. We have conjugated fluorescently tagged antibodies to NCNCs and shown that the protein-conjugated material is also capable of entering cells. This primes NCNCs to be a good candidate for subsequent protein modifications and applications in biological systems.
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Affiliation(s)
- Amber S Griffith
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA.
| | - Thomas D Zhang
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA.
| | - Seth C Burkert
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA.
| | - Zelal Adiguzel
- TUBITAK, Marmara Research Center, Genetic Engineering and Biotechnology Institute, 41470 Gebze/Kocaeli, Turkey.
| | - Ceyda Acilan
- School of Medicine, Koc University, 34450 Sarıyer, Turkey.
| | - Alexander Star
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA.
| | - William S Saunders
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA.
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220
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Zhu B, Guo J, Zhang L, Pan M, Jing X, Wang L, Liu X, Zuo X. In-Situ Configuration Studies on Segmented DNA Origami Nanotubes. Chembiochem 2019; 20:1508-1513. [PMID: 30702811 DOI: 10.1002/cbic.201800727] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 01/31/2019] [Indexed: 11/09/2022]
Abstract
One-dimensional nanotubes are of considerable interest in materials and biochemical sciences. A particular desire is to create DNA nanotubes with user-defined structural features and biological relevance, which will facilitate the application of these nanotubes in the controlled release of drugs, templating of other materials into linear arrays and the construction of artificial membrane channels. However, little is known about the structures of assembled DNA nanotubes in solution. Here we report an in situ exploration of segmented DNA nanotubes, composed of multiple units with set length distributions, by using synchrotron small-angle X-ray scattering (SAXS). Through joint experimental and theoretical studies, we show that the SAXS data are highly informative in the context of heterogeneous mixtures of DNA nanotubes. The structural parameters obtained by SAXS are in good agreement with those determined by atomic force microscopy (AFM), transmission electron microscopy (TEM), and dynamic light scattering (DLS). In particular, the SAXS data revealed important structural information on these DNA nanotubes, such as the in-solution diameters (≈25 nm), which could be obtained only with difficulty by use of other methods. Our results establish SAXS as a reliable structural analysis method for long DNA nanotubes and could assist in the rational design of these structures.
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Affiliation(s)
- Bowen Zhu
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, 201800, China
| | - Jingyang Guo
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, 201800, China
| | - Lixia Zhang
- Jiading District Central Hospital, Shanghai, 201800, China
| | - Muchen Pan
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, 201800, China
| | - Xinxin Jing
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, 201800, China
| | - Lihua Wang
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, University of the Chinese Academy of Sciences, Shanghai, 201800, China
| | - Xiaoguo Liu
- School of Chemistry and Chemical Engineering and Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Xiaolei Zuo
- School of Chemistry and Chemical Engineering and Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
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221
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Xu L, Li J, Dong Y, Xue J, Gu Y, Zeng H, Song J. Self-template Synthesis of Metal Halide Perovskite Nanotubes as Functional Cavities for Tailored Optoelectronic Devices. ACS Appl Mater Interfaces 2019; 11:21100-21108. [PMID: 31095367 DOI: 10.1021/acsami.9b04761] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Intriguing optoelectronic features of low-dimensional perovskites drive researchers to develop novel nanostructures for exploring new photophysical properties and meeting the requirements of future practical applications. Here, we report the facile and universal synthesis of metal halide perovskite nanotubes (NTs) in a micro alkylammonium emulsion system for the first time. The [PbBr6]4--based NTs with a diameter of 300 nm and length of 100 μm were synthesized through the reaction of PbBr2 and long-chain bromide in advance, which can be controllably converted into general metal halide perovskite APbBr3 (A = Cs, FA, MA) with preserved tubular morphology by introducing the Cs+, MA+, and FA+ cations. Importantly, the NTs can readily couple with other nanofillers exhibiting tunable and novel optoelectronic properties demonstrated by the photodetectors. The device performance can be significantly improved and broadened to infrared photoresponse through the introduction of Au nanocrystal (NC) plasma and PbS NCs, respectively. These results demonstrate that the metal halide perovskite NTs are expected to enrich the diversity of nanostructures and have a huge potential in the fabrication of integrated, light-manipulated, and miniaturized electronic and photonic devices.
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Affiliation(s)
- Leimeng Xu
- School of Materials Science and Engineering , Nanjing University of Science and Technology , Nanjing 210094 , China
- MIIT Key Laboratory of Advanced Display Materials and Devices , Institute of Optoelectronics & Nanomaterials , Nanjing 210094 , China
| | - Jianhai Li
- School of Materials Science and Engineering , Nanjing University of Science and Technology , Nanjing 210094 , China
- MIIT Key Laboratory of Advanced Display Materials and Devices , Institute of Optoelectronics & Nanomaterials , Nanjing 210094 , China
| | - Yuhui Dong
- School of Materials Science and Engineering , Nanjing University of Science and Technology , Nanjing 210094 , China
- MIIT Key Laboratory of Advanced Display Materials and Devices , Institute of Optoelectronics & Nanomaterials , Nanjing 210094 , China
| | - Jie Xue
- School of Materials Science and Engineering , Nanjing University of Science and Technology , Nanjing 210094 , China
- MIIT Key Laboratory of Advanced Display Materials and Devices , Institute of Optoelectronics & Nanomaterials , Nanjing 210094 , China
| | - Yu Gu
- School of Materials Science and Engineering , Nanjing University of Science and Technology , Nanjing 210094 , China
- MIIT Key Laboratory of Advanced Display Materials and Devices , Institute of Optoelectronics & Nanomaterials , Nanjing 210094 , China
| | - Haibo Zeng
- School of Materials Science and Engineering , Nanjing University of Science and Technology , Nanjing 210094 , China
- MIIT Key Laboratory of Advanced Display Materials and Devices , Institute of Optoelectronics & Nanomaterials , Nanjing 210094 , China
| | - Jizhong Song
- School of Materials Science and Engineering , Nanjing University of Science and Technology , Nanjing 210094 , China
- MIIT Key Laboratory of Advanced Display Materials and Devices , Institute of Optoelectronics & Nanomaterials , Nanjing 210094 , China
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222
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Abstract
RNA is a functionally rich and diverse biomaterial responsible for regulating several cellular processes. This functionality has been harnessed to build predominately small nanoscale structures for drug delivery and the treatment of disease. The understanding of design principles to build large RNA structures will allow for further control of stoichiometry and spatial arrangement drugs and ligands. We present the design and characterization of RNA nanotubes that self-assemble from programmable monomers, or tiles, formed by five distinct RNA strands. Tiles include double crossover junctions and assemble via single-stranded sticky-end domains. We find that nanotube formation is dependent on the intertile crossover distance. The average length observed for the annealed RNA nanotubes is ≈1.5 μm, with many nanotubes exceeding 10 μm, enabling the characterization of RNA nanotubes length distribution via fluorescence microscopy. Assembled tubes were observed to be stable for more than 24 h, however post-annealing growth under isothermal conditions does not occur. Nanotubes assemble also from RNA tiles modified to include a single-stranded overhang (toehold), suggesting that it may be possible to decorate these large RNA scaffolds with nanoparticles or other nucleic acid molecules.
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Affiliation(s)
- Jaimie Marie Stewart
- Department of Bioengineering , University of California at Riverside , Riverside , California 92521 , United States
| | - Cody Geary
- Department of Bioengineering , California Institute of Technology , Pasadena , California 91125 , United States
- Interdisciplinary Nanoscience Center , Aarhus University , Aarhus C 08000 , Denmark
| | - Elisa Franco
- Department of Mechanical Engineering , University of California at Riverside , Riverside , California 92521 , United States
- Department of Mechanical and Aerospace Engineering , University of California , Los Angeles , California 90095 , United States
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Liu Y, Zhou B, Liu S, Ma Q, Zhang WH. Galvanic Replacement Synthesis of Highly Uniform Sb Nanotubes: Reaction Mechanism and Enhanced Sodium Storage Performance. ACS Nano 2019; 13:5885-5892. [PMID: 31063350 DOI: 10.1021/acsnano.9b01660] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
One-dimensional nanotubes are very useful for achieving excellent performance in lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) due to the fact that tubular structures can effectively alleviate the structural strain and shorten the ion diffusion length during repeated cycling. In this work, we report a Cu2Sb-mediated growth strategy to controllably fabricate highly uniform Sb nanotubes (NTs), as well as Cu@Cu2Sb and Cu2Sb@Sb composite NTs, via a facile galvanic replacement reaction using Cu nanowires (NWs) as sacrificial templates. Benefiting from their structural merits, the Sb NTs manifest excellent sodium storage performance with superior rate performance (286 mAh g-1 at 10 A g-1) and extraordinary cycling stability (342 mAh g-1 after 6000 cycles at 1 A g-1). Furthermore, a full cell with Sb NTs as anode and Na3(VOPO4)2F as cathode exhibits a high energy density (252 Wh kg-1) and high output voltage (2.7 V), revealing their significant application promise in the next-generation SIBs.
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Affiliation(s)
- Yan Liu
- Sichuan Research Center of New Materials , Institute of Chemical Materials, China Academy of Engineering Physics , Chengdu 610200 , China
| | - Bin Zhou
- Sichuan Research Center of New Materials , Institute of Chemical Materials, China Academy of Engineering Physics , Chengdu 610200 , China
| | - Sheng Liu
- Sichuan Research Center of New Materials , Institute of Chemical Materials, China Academy of Engineering Physics , Chengdu 610200 , China
| | - Qingshan Ma
- Sichuan Research Center of New Materials , Institute of Chemical Materials, China Academy of Engineering Physics , Chengdu 610200 , China
| | - Wen-Hua Zhang
- Sichuan Research Center of New Materials , Institute of Chemical Materials, China Academy of Engineering Physics , Chengdu 610200 , China
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224
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Serra M, Anumol EA, Stolovas D, Pinkas I, Joselevich E, Tenne R, Enyashin A, Deepak FL. Synthesis and characterization of quaternary La(Sr)S-TaS 2 misfit-layered nanotubes. Beilstein J Nanotechnol 2019; 10:1112-1124. [PMID: 31165037 PMCID: PMC6541319 DOI: 10.3762/bjnano.10.111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 05/09/2019] [Indexed: 05/30/2023]
Abstract
Misfit-layered compounds (MLCs) are formed by the combination of different lattices and exhibit intriguing structural and morphological characteristics. MLC Sr x La1- x S-TaS2 nanotubes with varying Sr composition (10, 20, 40, and 60 Sr atom %, corresponding to x = 0.1, 0.2, 0.4 and 0.6, respectively) were prepared in the present study and systematically investigated using a combination of high-resolution electron microscopy and spectroscopy. These studies enable detailed insight into the structural aspects of these phases to be gained at the atomic scale. The addition of Sr had a significant impact on the formation of the nanotubes with higher Sr content, leading to a decrease in the yield of the nanotubes. This trend can be attributed to the reduced charge transfer between the rare earth/S unit (La x Sr1- x S) and the TaS2 layer in the MLC which destabilizes the MLC lattice. The influence of varying the Sr content in the nanotubes was systematically studied using Raman spectroscopy. Density functional theory calculations were carried out to support the experimental observations.
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Affiliation(s)
- Marco Serra
- Department of Materials and Interfaces, Weizmann Institute, Rehovot 76100, Israel
| | - Erumpukuthickal Ashokkumar Anumol
- Nanostructured Materials Group, Department of Advanced Electron Microscopy, Imaging and Spectroscopy, International Iberian Nanotechnology Laboratory (INL), Avenida Mestre Jose Veiga, Braga 4715-330, Portugal
| | - Dalit Stolovas
- Department of Materials and Interfaces, Weizmann Institute, Rehovot 76100, Israel
| | - Iddo Pinkas
- Chemical Research Support Department, Weizmann Institute, Rehovot 76100, Israel
| | - Ernesto Joselevich
- Department of Materials and Interfaces, Weizmann Institute, Rehovot 76100, Israel
| | - Reshef Tenne
- Department of Materials and Interfaces, Weizmann Institute, Rehovot 76100, Israel
| | - Andrey Enyashin
- Ural Federal University, Institute of Mathematics and Computer Sciences, Turgeneva Str. 4, 620083 Ekaterinburg, Russian Federation
- Institute of Solid State Chemistry, Ural Branch of Russian Academy of Sciences, Pervomayskaya Str. 91, Ekaterinburg 620990, Russian Federation
| | - Francis Leonard Deepak
- Nanostructured Materials Group, Department of Advanced Electron Microscopy, Imaging and Spectroscopy, International Iberian Nanotechnology Laboratory (INL), Avenida Mestre Jose Veiga, Braga 4715-330, Portugal
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225
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Andrzejczuk M, Roguska A, Pisarek M, Kędzierzawski P, Lewandowska M. Effect of Pt Deposits on TiO 2 Electrocatalytic Activity Highlighted by Electron Tomography. ACS Appl Mater Interfaces 2019; 11:18841-18848. [PMID: 31013048 DOI: 10.1021/acsami.9b03932] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Characterizing materials at small scales presents major challenges in the engineering of nanocomposite materials having a high specific surface area. Here, we show the application of electron tomography to describe the three-dimensional structure of highly ordered TiO2 nanotube arrays modified with Pt nanoparticles. The titanium oxide nanotubes were prepared by the electrochemical anodization of a Ti substrate after which Pt was deposited by magnetron sputtering. Such a composite shows high electrochemical activity that depends on the amount of the metal and the morphological parameters of the microstructure. However, a TiO2 structure modified with metallic nanoparticles has never been visualized in 3D, making it very difficult to understand the relationship between electrocatalytic activity and morphology. In this paper, TiO2 nanotubes of different sizes and different amounts of Pt were analyzed using the electron microscopy technique. Electrocatalytic activity was studied using the cyclic voltammetry (CV) method. For selected samples, electron tomography 3D structure reconstruction was performed to describe their fine microstructure. The highest activity was detected in the sample having bigger nanotubes (25 V) where the porosity of the structure was high and the Pt content was 0.1 mg cm-2. 3D imaging using electron tomography opens up new possibilities in the design of electrocatalytic materials.
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Affiliation(s)
- Mariusz Andrzejczuk
- Faculty of Materials Science and Engineering , Warsaw University of Technology , Woloska 141 , 02-507 Warsaw , Poland
| | - Agata Roguska
- Institute of Physical Chemistry, Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
| | - Marcin Pisarek
- Institute of Physical Chemistry, Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
| | - Piotr Kędzierzawski
- Institute of Physical Chemistry, Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland
| | - Małgorzata Lewandowska
- Faculty of Materials Science and Engineering , Warsaw University of Technology , Woloska 141 , 02-507 Warsaw , Poland
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226
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Affiliation(s)
- Megan M Monsanto
- From the Department of Biology, San Diego State University Heart Institute, San Diego State University, CA
| | - Bingyan J Wang
- From the Department of Biology, San Diego State University Heart Institute, San Diego State University, CA
| | - Mark A Sussman
- From the Department of Biology, San Diego State University Heart Institute, San Diego State University, CA.
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227
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Amano F, Mukohara H, Shintani A, Tsurui K. Solid Polymer Electrolyte-Coated Macroporous Titania Nanotube Photoelectrode for Gas-Phase Water Splitting. ChemSusChem 2019; 12:1925-1930. [PMID: 30338662 DOI: 10.1002/cssc.201802178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Revised: 10/17/2018] [Indexed: 06/08/2023]
Abstract
Photoelectrochemical (PEC) water vapor splitting by using n-type semiconductor electrodes with a proton exchange membrane (PEM) enabled pure hydrogen production from humidity in ambient air. We proved a design concept that the gas-electrolyte-semiconductor triple-phase boundary on a nanostructured photoanode is important for the photoinduced gas-phase reaction. A surface coating of solid-polymer electrolyte on a macroporous titania-nanotube array (TNTA) electrode markedly enhanced the incident photon-to-current conversion efficiency (IPCE) at the gas-solid interface. This indicates that proton-coupled electron transfer is the rate-determining step on the bare TNTA electrode for the gas-phase PEC reaction. The perfluorosulfonate ionomer-coated TNTA photoanode exhibited an IPCE of 26 % at an applied voltage of 1.2 V under 365 nm ultraviolet irradiation. The hydrogen production rate in a large PEM-PEC cell (16 cm2 ) was 10 μmol min-1 .
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Affiliation(s)
- Fumiaki Amano
- Department of Chemical and Environmental Engineering, The University of Kitakyushu, Kitakyushu, Fukuoka, 808-0135, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Kawaguchi, Saitama, 332-0012, Japan
| | - Hyosuke Mukohara
- Department of Chemical and Environmental Engineering, The University of Kitakyushu, Kitakyushu, Fukuoka, 808-0135, Japan
| | - Ayami Shintani
- Department of Chemical and Environmental Engineering, The University of Kitakyushu, Kitakyushu, Fukuoka, 808-0135, Japan
| | - Kenyou Tsurui
- Department of Chemical and Environmental Engineering, The University of Kitakyushu, Kitakyushu, Fukuoka, 808-0135, Japan
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228
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Li JL, Zhao L, Li XF, Hao SE, Wang ZB. Carbon-Coated and Interfacial-Functionalized Mixed-Phase Mo x Ti 1-x O 2-δ Nanotubes as Highly Active and Durable PtRu Catalyst Support for Methanol Electrooxidation. Chem Asian J 2019; 14:1549-1556. [PMID: 30924601 DOI: 10.1002/asia.201900264] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 02/22/2019] [Revised: 03/13/2019] [Indexed: 11/11/2022]
Abstract
A synchronous carbon-coating and interfacial-functionalizing approach is proposed for the fabrication of Mo-doped Mox Ti1-x O2-δ nanotubes (C@IF-MTNTs) under mild hydrothermal reaction with subsequent annealing as advanced catalyst supports for PtRu nanoparticles (NPs) towards methanol electrooxidation. The carbonation of glucose and Mo-doping takes place simultaneously at the interface of pristine anatase TiO2 nanotubes (TNTs), generating a unique concentric multilayered one-dimensional (1D) structure with crystalline an anatase/rutile mixed-phase TiO2 core and Mo-functionalized interface and subsequently a carbon shell. The obtained PtRu/C@IF-MTNTs catalyst exhibits an over 2 times higher mass activity with comparable durability than that of the unmodified PtRu/C@TNTs catalyst and over 1.7 times higher mass activity with over 20 % higher stability than that of PtRu/C catalyst. Such superior catalytic performance towards methanol electrooxidation is ascribed to the Mo-functionalized interface, concentric multilayered 1D architecture, and anatase/rutile mixed-phase core, which facilitates the charge transport through 1D structural support and electronic interaction between C@IF-MTNTs and ultrafine PtRu NPs. This work reveals the critical application of a 1D interfacial functionalized architecture for advanced energy storage and conversion.
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Affiliation(s)
- Jia-Long Li
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Lei Zhao
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Xi-Fei Li
- Institute of Advanced Electrochemical Energy, School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, China
| | - Su-E Hao
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Zhen-Bo Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
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229
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Abstract
Cells from all three domains of life, Archaea, Bacteria and Eukarya, produce extracellular vesicles (EVs) which are sometimes associated with filamentous structures known as nanopods or nanotubes. The mechanisms of EV biogenesis in the three domains remain poorly understood, although studies in Bacteria and Eukarya indicate that the regulation of lipid composition plays a major role in initiating membrane curvature. EVs are increasingly recognized as important mediators of intercellular communication via transfer of a wide variety of molecular cargoes. They have been implicated in many aspects of cell physiology such as stress response, intercellular competition, lateral gene transfer (via RNA or DNA), pathogenicity and detoxification. Their role in various human pathologies and aging has aroused much interest in recent years. EVs can be used as decoys against viral attack but virus-infected cells also produce EVs that boost viral infection. Here, we review current knowledge on EVs in the three domains of life and their interactions with the viral world.
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Affiliation(s)
- Sukhvinder Gill
- Institute for Integrative Biology of the Cell (I2BC), Biologie Cellulaire des Archées (BCA), CEA, CNRS, Université Paris-Sud, 91405 Orsay cedex, France
| | - Ryan Catchpole
- Institut Pasteur, Unité de Biologie Moléculaire du Gène chez les Extrêmophiles, Département de Microbiologie, F75015 Paris, France
| | - Patrick Forterre
- Institute for Integrative Biology of the Cell (I2BC), Biologie Cellulaire des Archées (BCA), CEA, CNRS, Université Paris-Sud, 91405 Orsay cedex, France
- Institut Pasteur, Unité de Biologie Moléculaire du Gène chez les Extrêmophiles, Département de Microbiologie, F75015 Paris, France
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230
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Martin-Gallego M, Lopez-Hernandez E, Pinto J, Rodriguez-Perez MA, Lopez-Manchado MA, Verdejo R. Transport Properties of One-Step Compression Molded Epoxy Nanocomposite Foams. Polymers (Basel) 2019; 11:polym11050756. [PMID: 31052215 PMCID: PMC6572515 DOI: 10.3390/polym11050756] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 03/20/2019] [Revised: 04/16/2019] [Accepted: 04/25/2019] [Indexed: 12/03/2022] Open
Abstract
Owing to their high strength and stiffness, thermal and environmental stability, lower shrinkage, and water resistance, epoxy resins have been the preferred matrix for the development of syntactic foams using hollow glass microspheres. Although these foams are exploited in multiple applications, one of their issues is the possibility of breakage of the glass hollow microspheres during processing. Here, we present a straightforward and single-step foaming protocol using expandable polymeric microspheres based on the well-established compression molding process. We demonstrate the viability of the protocol producing two sets of nanocomposite foams filled with carbon-based nanoparticles with improved transport properties.
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Affiliation(s)
- Mario Martin-Gallego
- Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, C/ Juan de la Cierva, 3, 28006 Madrid, Spain.
| | - Emil Lopez-Hernandez
- Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, C/ Juan de la Cierva, 3, 28006 Madrid, Spain.
| | - Javier Pinto
- Cellular Materials Laboratory (CellMat), Condensed Matter Physics Department, Faculty of Science, University of Valladolid, Campus Miguel Delibes, Paseo de Belén, 7, 47011 Valladolid, Spain.
| | - Miguel A Rodriguez-Perez
- Cellular Materials Laboratory (CellMat), Condensed Matter Physics Department, Faculty of Science, University of Valladolid, Campus Miguel Delibes, Paseo de Belén, 7, 47011 Valladolid, Spain.
| | - Miguel A Lopez-Manchado
- Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, C/ Juan de la Cierva, 3, 28006 Madrid, Spain.
| | - Raquel Verdejo
- Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, C/ Juan de la Cierva, 3, 28006 Madrid, Spain.
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231
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Shen X, Al-Baadani MA, He H, Cai L, Wu Z, Yao L, Wu X, Wu S, Chen M, Zhang H, Liu J. Antibacterial and osteogenesis performances of LL37-loaded titania nanopores in vitro and in vivo. Int J Nanomedicine 2019; 14:3043-3054. [PMID: 31118621 PMCID: PMC6500437 DOI: 10.2147/ijn.s198583] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 03/04/2019] [Indexed: 12/17/2022] Open
Abstract
Background: Many studies have shown that the size of nanotube (NT) can significantly affect the behavior of osteoblasts on titanium-based materials. But the weak bonding strength between NT and substrate greatly limits their application. Purpose: The objective of this study was to compare the stability of NT and nanopore (NP) coatings, and further prepare antibacterial titanium-based materials by loading LL37 peptide in NP structures. Methods: The adhesion strength of NT and NP layers was investigated using a scratch tester. The proliferation and differentiation of MC3T3-E1 cells on different substrates were evaluated in vitro by CCK8, alkaline phosphatase activity, mineralization and polymerase chain reaction assays. The antibacterial rates of NP and NP/LL37 were also measured by spread plate method. Moreover, the osteogenesis around NP and NP/LL373 in vivo was further evaluated using uninfected and infected models. Results: Scratch test proved that the NP layers had stronger bonding strength with the substrates due to their continuous pore structures and thicker pipe walls than the independent NT structures. In vitro, cell results showed that MC3T3-E1 cells on NP substrates had better early adhesion, spreading and osteogenic differentiation than those of NT group. In addition, based on the drug reservoir characteristics of porous materials, the NP substrates were also used to load antibacterial LL37 peptide. After loading LL37, the antibacterial and osteogenic induction abilities of NP were further improved, thus significantly promoting osteogenesis in both uninfected and infected models. Conclusion: We determined that the NP layers had stronger bonding strength than NT structures, and the corresponding NP materials might be more suitable than NT for preparing drug-device combined titanium implants for bone injury treatment.
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Affiliation(s)
- Xinkun Shen
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou325027, People’s Republic of China
| | - Mohammed A Al-Baadani
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou325027, People’s Republic of China
| | - Hongli He
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou325027, People’s Republic of China
| | - Lina Cai
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou325027, People’s Republic of China
| | - Zuosu Wu
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou325027, People’s Republic of China
| | - Litao Yao
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou325027, People’s Republic of China
| | - Xinghai Wu
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou325027, People’s Republic of China
| | - Shuyi Wu
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou325027, People’s Republic of China
| | - Mengyu Chen
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou325027, People’s Republic of China
| | - Hualin Zhang
- College of Stomatology, Ningxia Medical University, Yinchuan750004, People’s Republic of China
- General Hospital of Ningxia Medical University, Yinchuan750004, People’s Republic of China
| | - Jinsong Liu
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou325027, People’s Republic of China
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232
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Kogashi K, Matsuno T, Sato S, Isobe H. Narrowing Segments of Helical Carbon Nanotubes with Curved Aromatic Panels. Angew Chem Int Ed Engl 2019; 58:7385-7389. [PMID: 30938054 DOI: 10.1002/anie.201902893] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [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: 03/07/2019] [Indexed: 11/06/2022]
Abstract
Rigid molecular cylinders with a 1 nm diameter were synthesized by assembling arylene panels with Pt-mediated macrocylization. Chrysenylene panels that previously participated in tetrameric macrocyclization were contorted by the addition of two benzo groups on the sides to form dibenzochrysenylene, which allowed for a reduction in the numbers of participating panels to three. Consequently, narrowed cyclochrysenylene congeners were obtained. The narrowed chiral cylinders possessed width-dependent chiroptical properties. The magnetic transition dipole moment was dictated by the radius of a ring-current-like circle that was formed by local electric transition dipole moments on the cylinder.
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Affiliation(s)
- Kanako Kogashi
- Department of Chemistry, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan
| | - Taisuke Matsuno
- Department of Chemistry, The University of Tokyo, JST, ERATO, Isobe Degenerate π-Integration Project, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Sota Sato
- Department of Chemistry, The University of Tokyo, JST, ERATO, Isobe Degenerate π-Integration Project, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Hiroyuki Isobe
- Department of Chemistry, The University of Tokyo, JST, ERATO, Isobe Degenerate π-Integration Project, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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233
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Kafshgari MH, Mazare A, Distaso M, Goldmann WH, Peukert W, Fabry B, Schmuki P. Intracellular Drug Delivery with Anodic Titanium Dioxide Nanotubes and Nanocylinders. ACS Appl Mater Interfaces 2019; 11:14980-14985. [PMID: 30916543 DOI: 10.1021/acsami.9b01211] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Titanium dioxide (TiO2) holds remarkable promises for developing current theranostic strategies. Anodic TiO2 nanostructures as a porous scaffold have offered a broad range of useful theranostic properties; however, previous attempts to generate single and uniform TiO2 one-dimensional nanocarriers from anodic nanotube arrays have resulted in a broad cluster size distribution of arbitrarily broken tubes that are unsuitable for therapeutic delivery systems due to poor biodistribution and the risk of introducing tissue inflammation. Here, we achieve well-separated, uniformly shaped anodic TiO2 nanotubes and nanocylinders through a time-varying electrochemical anodization protocol that leads to the generation of planar sheets of weakly connected nanotubes with a defined fracture point near the base. Subsequent sonication cleanly detaches the nanotubes from the base. Depending on the position of the fracture point, we can fabricate single-anodic nanocylinders that are open on both ends and nanotubes that are closed on one end. We proceed to show that anodic nanotubes and nanocylinders are nontoxic at therapeutic concentrations. When conjugated with the anticancer drug doxorubicin using a pH-responsive linker, they are readily internalized by cells and subsequently release their drug cargo into acidic intracellular compartments. Our results demonstrate that uniformly sized anodic TiO2 nanotubes and nanocylinders are suitable for subcellular delivery of therapeutic agents in cancer therapy.
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Affiliation(s)
| | | | | | - Wolfgang H Goldmann
- Department of Physics, Biophysics Group , University of Erlangen-Nuremberg , Erlangen 91052 , Germany
| | | | - Ben Fabry
- Department of Physics, Biophysics Group , University of Erlangen-Nuremberg , Erlangen 91052 , Germany
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234
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Liu Z, Murphy AW, Kuppe C, Hooper DC, Valev VK, Ilie A. WS 2 Nanotubes, 2D Nanomeshes, and 2D In-Plane Films through One Single Chemical Vapor Deposition Route. ACS Nano 2019; 13:3896-3909. [PMID: 30912636 PMCID: PMC7007277 DOI: 10.1021/acsnano.8b06515] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Accepted: 03/26/2019] [Indexed: 05/20/2023]
Abstract
We demonstrate a versatile, catalyst free chemical vapor deposition process on insulating substrates capable of producing in one single stream one-dimensional (1D) WO3- x suboxides leading to a wide range of substrate-supported 2H-WS2 polymorphs: a tunable class of out-of-plane (of the substrate) nanophases, with 1D nanotubes and a pure WS2, two-dimensional (2D) nanomesh (defined as a network of webbed, micron-size, few-layer 2D sheets) at its extremes; and in-plane (parallel to the substrate) mono- and few-layer 2D domains. This entails a two-stage approach in which the 2WO3 + 7S → 2WS2 + 3SO2 reaction is intentionally decoupled. First, various morphologies of nanowires or nanorods of high stoichiometry, WO2.92/WO2.9 suboxides (belonging to the class of Magnéli phases) were formed, followed by their sulfurization to undergo reduction to the aforementioned WS2 polymorphs. The continuous transition of WS2 from nanotubes to the out-of-plane 2D nanomesh, via intermediary, mixed 1D-2D phases, delivers tunable functional properties, for example, linear and nonlinear optical properties, such as reflectivity (linked to optical excitations in the material), and second harmonic generation (SHG) and onset of saturable absorption. The SHG effect is very strong across the entire tunable class of WS2 nanomaterials, weakest in nanotubes, and strongest in the 2D nanomesh. Furthermore, a mechanism via suboxide (WO3- x) intermediate as a possible path to 2D domain growth is demonstrated. 2D, in-plane WS2 domains grow via "self-seeding and feeding" where short WO2.92/WO2.9 nanorods provide both the nucleation sites and the precursor feedstock. Understanding the reaction path (here, in the W-O-S space) is an emerging approach toward controlling the nucleation, growth, and morphology of 2D domains and films of transition-metal dichalcogenides.
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Affiliation(s)
- Zichen Liu
- Centre
for Graphene Science, University of Bath, Bath BA2 7AY, United Kingdom
- Centre
for Nanoscience and Nanotechnology, University
of Bath, Bath BA2 7AY, United Kingdom
- Department
of Physics, University of Bath, Claverton Down, Bath BA2
7AY, United Kingdom
| | - Alexander William
Allen Murphy
- Centre
for Photonics and Photonic Materials, University
of Bath, Bath BA2 7AY, United Kingdom
- Centre
for Nanoscience and Nanotechnology, University
of Bath, Bath BA2 7AY, United Kingdom
- Department
of Physics, University of Bath, Claverton Down, Bath BA2
7AY, United Kingdom
| | - Christian Kuppe
- Centre
for Photonics and Photonic Materials, University
of Bath, Bath BA2 7AY, United Kingdom
- Centre
for Nanoscience and Nanotechnology, University
of Bath, Bath BA2 7AY, United Kingdom
- Department
of Physics, University of Bath, Claverton Down, Bath BA2
7AY, United Kingdom
| | - David Charles Hooper
- Centre
for Photonics and Photonic Materials, University
of Bath, Bath BA2 7AY, United Kingdom
- Centre
for Nanoscience and Nanotechnology, University
of Bath, Bath BA2 7AY, United Kingdom
- Department
of Physics, University of Bath, Claverton Down, Bath BA2
7AY, United Kingdom
| | - Ventsislav Kolev Valev
- Centre
for Photonics and Photonic Materials, University
of Bath, Bath BA2 7AY, United Kingdom
- Centre
for Nanoscience and Nanotechnology, University
of Bath, Bath BA2 7AY, United Kingdom
- Department
of Physics, University of Bath, Claverton Down, Bath BA2
7AY, United Kingdom
| | - Adelina Ilie
- Centre
for Graphene Science, University of Bath, Bath BA2 7AY, United Kingdom
- Centre
for Nanoscience and Nanotechnology, University
of Bath, Bath BA2 7AY, United Kingdom
- Department
of Physics, University of Bath, Claverton Down, Bath BA2
7AY, United Kingdom
- E-mail:
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235
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Bhandari S, Hao B, Waters K, Lee CH, Idrobo JC, Zhang D, Pandey R, Yap YK. Two-Dimensional Gold Quantum Dots with Tunable Bandgaps. ACS Nano 2019; 13:4347-4353. [PMID: 30946561 DOI: 10.1021/acsnano.8b09559] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Metallic gold nanoparticles (Au NPs) with multilayer Au atoms are useful for plasmonic, chemical, medical, and metamaterial application. In this article, we report the opening of the bandgap in substrate-supported two-dimensional (2D) gold quantum dots (Au QDs) with monolayer Au atoms. Calculations based on density functional theory suggest that 2D Au QDs are energetically favorable over 3D Au clusters when coated on hexagonal boron nitride (BN) surfaces. Experimentally, we find that BN nanotubes (BNNTs) can be used to stabilize 2D Au QDs on their cylindrical surfaces as well as Au atoms, dimers, and trimers. The electrically insulating and optically transparent BNNTs enable the detection of the optical bandgaps of the Au QDs in the visible spectrum. We further demonstrate that the size and shapes of 2D Au QDs could be atomically trimmed and restructured by electron beam irradiation. Our results may stimulate further exploration of energetically stable, metal-based 2D semiconductors, with properties tunable atom by atom.
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Affiliation(s)
- Shiva Bhandari
- Department of Physics , Michigan Technological University , 1400 Townsend Drive , Houghton , Michigan 49931 , United States
| | - Boyi Hao
- Department of Physics , Michigan Technological University , 1400 Townsend Drive , Houghton , Michigan 49931 , United States
| | - Kevin Waters
- Department of Physics , Michigan Technological University , 1400 Townsend Drive , Houghton , Michigan 49931 , United States
| | - Chee Huei Lee
- Department of Physics , Michigan Technological University , 1400 Townsend Drive , Houghton , Michigan 49931 , United States
| | - Juan-Carlos Idrobo
- Center for Nanophase Materials Sciences , Oak Ridge National Laboratory , 1 Bethel Valley Road , Oak Ridge , Tennessee 3783 , United States
| | - Dongyan Zhang
- Department of Physics , Michigan Technological University , 1400 Townsend Drive , Houghton , Michigan 49931 , United States
| | - Ravindra Pandey
- Department of Physics , Michigan Technological University , 1400 Townsend Drive , Houghton , Michigan 49931 , United States
| | - Yoke Khin Yap
- Department of Physics , Michigan Technological University , 1400 Townsend Drive , Houghton , Michigan 49931 , United States
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236
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Yu Y, Zhang Z, Dai L, Wang F. Copolymer-Induced Intermolecular Charge Transfer: Enhancing the Activity of Metal-Free Catalysts for Oxygen Reduction. Chemistry 2019; 25:5652-5657. [PMID: 30768737 DOI: 10.1002/chem.201806226] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 12/16/2018] [Revised: 02/11/2019] [Indexed: 11/11/2022]
Abstract
Breaking the electroneutrality of sp2 carbon lattice is a viable way for nanocarbon material to modulate the charge delocalization and to further alter the electrocatalytic activity. Positive charge spreadsheeting is preferable for catalyzing the oxygen reduction reaction (ORR) and other electrochemical reactions. Analogously to the case of intramolecular charge transfer by heteroatom doping, electrons in the conjugated carbon lattice can be redistributed by the intermolecular charge transfer from the nanocarbon material to the polyelectrolyte. A copolymeric electrolyte, epichlorohydrin-dimethylamine copolymer (EDC) was synthesized. The EDC-modified carbon nanotube (CNT) hybrid was subsequently fabricated by sonication treatment and served as a metal-free carbonaceous electrocatalyst with remarkable catalytic activity and stability. The resultant hybrid presents positive charge spreadsheeting on CNT as a result of the interfacial electron transfer from CNT to EDC. DFT calculations were further carried out to reveal that the enhancement of the wrapped EDC polyelectrolyte originates from the synergetic effect of the quaternary ammonium-hydroxyl covalently bonded structure. The CNT-EDC hybrid not only provides an atomically precise regulation to modulate nanocarbon materials from inactive carbonaceous materials into efficient metal-free catalysts, but it also opens new avenues to develop metal-free catalysts with well-defined and highly active sites.
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Affiliation(s)
- Yihuan Yu
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology, for Materials, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.,Beijing Advanced Innovation Center for Soft Matter Science and, Engineering, College of Energy, Beijing University of, Chemical Technology, Beijing, 100029, P. R. China
| | - Zhengping Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology, for Materials, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.,Beijing Advanced Innovation Center for Soft Matter Science and, Engineering, College of Energy, Beijing University of, Chemical Technology, Beijing, 100029, P. R. China
| | - Liming Dai
- Beijing Advanced Innovation Center for Soft Matter Science and, Engineering, College of Energy, Beijing University of, Chemical Technology, Beijing, 100029, P. R. China.,Center of Advanced Science and Engineering for Carbon, (Case4carbon), Department of Macromolecular Science and, Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Feng Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology, for Materials, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.,Beijing Advanced Innovation Center for Soft Matter Science and, Engineering, College of Energy, Beijing University of, Chemical Technology, Beijing, 100029, P. R. China
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237
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Fantuzzi F, Oliveira RR, Henkes AV, Rubayo-Soneira J, Nascimento MAC. Mechanistic Insights into the Formation of Lithium Fluoride Nanotubes. Chemistry 2019; 25:5269-5279. [PMID: 30868682 DOI: 10.1002/chem.201805991] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 11/30/2018] [Revised: 01/14/2019] [Indexed: 12/07/2022]
Abstract
Born-Oppenheimer molecular dynamics (BOMD) and periodic density functional theory (DFT) calculations have been applied for describing the mechanism of formation of lithium fluoride (LiF) nanotubes with cubic, hexagonal, octagonal, decagonal, dodecagonal, and tetradecagonal cross-sections. It has been shown that high energy structures, such as nanowires, nanorings, nanosheets, and nanopolyhedra are transient species for the formation of stable nanotubes. Unprecedented (LiF)n clusters (n≤12) were also identified, some of them lying less than 10 kcal mol-[1] above their respective global minima. Such findings indicate that stochastic synthetic techniques, such as laser ablation and chemical vapor deposition, should be combined with a template-driven procedure in order to generate the nanotubes with adequate efficiency. Apart from the stepwise growth of LiF units, the formation of nanotubes was also studied by rolling up a planar square sheet monolayer, which could be hypothetically produced from the exfoliation of the FCC crystal structure. It was shown that both pathways could lead to the formation of alkali halide nanotubes, a still unprecedented set of one-dimensional materials.
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Affiliation(s)
- Felipe Fantuzzi
- Instituto de Química, Universidade Federal do Rio de Janeiro (UFRJ), Av. Athos da Silveira Ramos 149, 21941-909, Rio de Janeiro, Brazil.,Current Address: Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Ricardo R Oliveira
- Instituto de Química, Universidade Federal do Rio de Janeiro (UFRJ), Av. Athos da Silveira Ramos 149, 21941-909, Rio de Janeiro, Brazil
| | - Aline V Henkes
- Instituto de Química, Universidade Federal do Rio de Janeiro (UFRJ), Av. Athos da Silveira Ramos 149, 21941-909, Rio de Janeiro, Brazil
| | - Jesús Rubayo-Soneira
- Instituto Superior de Tecnologías y Ciencias Aplicadas (InSTEC), Universidad de La Habana, Ave. Salvador Allende No. 1110, Quinta de los Molinos, 10400, La Habana, Cuba
| | - Marco Antonio Chaer Nascimento
- Instituto de Química, Universidade Federal do Rio de Janeiro (UFRJ), Av. Athos da Silveira Ramos 149, 21941-909, Rio de Janeiro, Brazil
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238
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Feitosa SA, Palasuk J, Geraldeli S, Windsor LJ, Bottino MC. Physicochemical and biological properties of novel chlorhexidine-loaded nanotube-modified dentin adhesive. J Biomed Mater Res B Appl Biomater 2019; 107:868-875. [PMID: 30199597 PMCID: PMC6408277 DOI: 10.1002/jbm.b.34183] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 10/25/2017] [Revised: 05/21/2018] [Accepted: 05/28/2018] [Indexed: 11/09/2022]
Abstract
A commercially available three-step (etch-and-rinse) adhesive was modified by adding chlorhexidine (CHX)-loaded nanotubes (Halloysite®, HNT) at two concentrations (CHX10% and CHX20%). The experimental groups were: SBMP (unmodified adhesive, control), HNT (SBMP modified with HNT), CHX10 (SBMP modified with HNT loaded with CHX10%), and CHX20 (SBMP modified with HNT loaded with CHX20%). Changes in the degree of conversion (DC%), Knoop hardness (KHN), water sorption (WS), solubility (SL), antimicrobial activity, cytotoxicity, and anti-matrix metalloproteinase [MMP-1] activity (collagenase-I) were evaluated. In regards to DC%, two-way ANOVA followed by Tukey's post-hoc test revealed that only the factor "adhesive" was statistically significant (p < 0.05). No significant differences were detected in DC% when 20 s light-curing was used (p > 0.05). For Knoop microhardness, one-way ANOVA followed by the Tukey's test showed statistically significant differences when comparing HNT (20.82 ± 1.65) and CHX20% (21.71 ± 2.83) with the SBMP and CHX10% groups. All adhesives presented similar WS and cytocompatibility. The CHX-loaded nanotube-modified adhesive released enough CHX to inhibit the growth of S. mutans and L. casei. Adhesive eluates were not able to effectively inhibit MMP-1 activity. The evaluation of higher CHX concentrations might be necessary to provide an effective and predictable MMP inhibition. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res B Part B, 2018. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 868-875, 2019.
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Affiliation(s)
- Sabrina A. Feitosa
- Department of Biomedical and Applied Sciences, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA
| | - Jadesada Palasuk
- Department of Restorative Dentistry, Faculty of Dentistry, Naresuan University, Phitsanulok, 65000, Thailand
| | - Saulo Geraldeli
- Restorative Dental Sciences, Operative Division, College of Dentistry, University of Florida, Gainesville, FL, 32610, USA
| | - L. Jack Windsor
- Department of Biomedical and Applied Sciences, Indiana University School of Dentistry, Indianapolis, IN, 46202, USA
| | - Marco C. Bottino
- Department of Cariology, Restorative Sciences, and Endodontics, University of Michigan School of Dentistry, Ann Arbor, MI, 48109, USA
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239
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Bhattacharya S, Baidya AK, Pal RR, Mamou G, Gatt YE, Margalit H, Rosenshine I, Ben-Yehuda S. A Ubiquitous Platform for Bacterial Nanotube Biogenesis. Cell Rep 2019; 27:334-342.e10. [PMID: 30929979 PMCID: PMC6456723 DOI: 10.1016/j.celrep.2019.02.055] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [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: 05/08/2018] [Revised: 02/05/2019] [Accepted: 02/13/2019] [Indexed: 01/01/2023] Open
Abstract
We have previously described the existence of membranous nanotubes, bridging adjacent bacteria, facilitating intercellular trafficking of nutrients, cytoplasmic proteins, and even plasmids, yet components enabling their biogenesis remain elusive. Here we reveal the identity of a molecular apparatus providing a platform for nanotube biogenesis. Using Bacillus subtilis (Bs), we demonstrate that conserved components of the flagellar export apparatus (FliO, FliP, FliQ, FliR, FlhB, and FlhA), designated CORE, dually serve for flagellum and nanotube assembly. Mutants lacking CORE genes, but not other flagellar components, are deficient in both nanotube production and the associated intercellular molecular trafficking. In accord, CORE components are located at sites of nanotube emergence. Deleting COREs of distinct species established that CORE-mediated nanotube formation is widespread. Furthermore, exogenous COREs from diverse species could restore nanotube generation and functionality in Bs lacking endogenous CORE. Our results demonstrate that the CORE-derived nanotube is a ubiquitous organelle that facilitates intercellular molecular trade across the bacterial kingdom. Conserved flagellar CORE components dually serve for flagella and nanotube assembly CORE mutants are deficient in nanotube formation and intercellular molecular trade CORE-dependent nanotube production is conserved among distinct bacterial species The CORE-nanotube organelle can provide a common path for bacterial molecular trade
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Affiliation(s)
- Saurabh Bhattacharya
- Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, POB 12272, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
| | - Amit K Baidya
- Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, POB 12272, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
| | - Ritesh Ranjan Pal
- Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, POB 12272, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
| | - Gideon Mamou
- Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, POB 12272, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
| | - Yair E Gatt
- Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, POB 12272, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
| | - Hanah Margalit
- Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, POB 12272, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
| | - Ilan Rosenshine
- Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, POB 12272, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel.
| | - Sigal Ben-Yehuda
- Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, POB 12272, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel.
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240
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Zhang C, Zhang W, Drewett NE, Wang X, Yoo SJ, Wang H, Deng T, Kim JG, Chen H, Huang K, Feng S, Zheng W. Integrating Catalysis of Methane Decomposition and Electrocatalytic Hydrogen Evolution with Ni/CeO 2 for Improved Hydrogen Production Efficiency. ChemSusChem 2019; 12:1000-1010. [PMID: 30565883 DOI: 10.1002/cssc.201802618] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 12/15/2018] [Indexed: 06/09/2023]
Abstract
Ni/CeO2 enables either methane decomposition or water electrolysis for pure hydrogen production. Ni/CeO2 , prepared by a sol-gel method with only one heat treatment step, was used to catalyze methane decomposition for the generation of H2 . The solid byproduct, Ni/CeO2 /carbon nanotube (CNT), was further employed as an electrocatalyst in the hydrogen evolution reaction (HER) for H2 production. The Ni/CeO2 catalyst exhibits excellent activity for methane decomposition because CeO2 prevents carbon encapsulation of Ni nanoparticles during the preparation process and forms a special metal-support interface with Ni. The derived CNTs act as antenna to improve conductivity and promote the dispersion of agglomerated Ni/CeO2 . In addition, they provide H2 diffusion paths and prevent Ni/CeO2 from peeling off the HER electrode. Although long-term methane decomposition reduces the HER activity of Ni/CeO2 /CNTs (owing to degradation of the delicate Ni/CeO2 interface), the tunable nature of the synthesis makes this an attractive sustainable approach to synthesize future high-performance materials.
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Affiliation(s)
- Cai Zhang
- State Key Laboratory of Automotive Simulation and Control, and School of Materials Science & Engineering, and Electron, Microscopy Center, and International Center of Future Science, Jilin University, Changchun, 130012, P.R. China
| | - Wei Zhang
- State Key Laboratory of Automotive Simulation and Control, and School of Materials Science & Engineering, and Electron, Microscopy Center, and International Center of Future Science, Jilin University, Changchun, 130012, P.R. China
- CIC Energigune, Miñano, 01510, Spain
- IKERBASQUE, Basque Foundation for Science, Bilbao, 48013, Spain
| | | | - Xiyang Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P.R. China
| | - Seung Jo Yoo
- Electron Microscopy Research Center, Korea Basic Science Institute, Daejeon, 34133, South Korea
| | - Haoxiang Wang
- State Key Laboratory of Automotive Simulation and Control, and School of Materials Science & Engineering, and Electron, Microscopy Center, and International Center of Future Science, Jilin University, Changchun, 130012, P.R. China
| | - Ting Deng
- State Key Laboratory of Automotive Simulation and Control, and School of Materials Science & Engineering, and Electron, Microscopy Center, and International Center of Future Science, Jilin University, Changchun, 130012, P.R. China
| | - Jin-Gyu Kim
- Electron Microscopy Research Center, Korea Basic Science Institute, Daejeon, 34133, South Korea
| | - Hong Chen
- State Key Laboratory of Automotive Simulation and Control, and School of Materials Science & Engineering, and Electron, Microscopy Center, and International Center of Future Science, Jilin University, Changchun, 130012, P.R. China
| | - Keke Huang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P.R. China
| | - Shouhua Feng
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, P.R. China
| | - Weitao Zheng
- State Key Laboratory of Automotive Simulation and Control, and School of Materials Science & Engineering, and Electron, Microscopy Center, and International Center of Future Science, Jilin University, Changchun, 130012, P.R. China
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241
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Kavand H, Rahaie M, Koohsorkhi J, Haghighipour N, Bonakdar S. A conductive cell-imprinted substrate based on CNT-PDMS composite. Biotechnol Appl Biochem 2019; 66:445-453. [PMID: 30817028 DOI: 10.1002/bab.1741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 12/08/2018] [Accepted: 02/24/2019] [Indexed: 11/08/2022]
Abstract
Cell function regulation is influenced by continuous biochemical and biophysical signal exchange within the body. Substrates with nano/micro-scaled topographies that mimic the physiological niche are widely applied for tissue engineering applications. As the cartilage niche is composed of several stimulating factors, a multifunctional substrate providing topographical features while having the capability of electrical stimulation is presented. Herein, we demonstrate a biocompatible and conductive chondrocyte cell-imprinted substrate using polydimethylsiloxane (PDMS) and carbon nanotubes (CNTs) as conductive fillers. Unlike the conventional silicon wafers or structural photoresist masters used for molding, cell surface topographical replication is challenging as biological cells showed extremely sensitive to chemical solvent residues during molding. The composite showed no significant difference compared with PDMS with regard to cytotoxicity, whereas an enhanced cell adhesion was observed on the conductive composite's surface. Integration of nanomaterials into the cell seeding scaffolds can make tissue regeneration process more efficient.
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Affiliation(s)
- Hanie Kavand
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | - Mahdi Rahaie
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | - Javad Koohsorkhi
- Advanced Micro and Nano Devices Lab, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | | | - Shahin Bonakdar
- National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran
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242
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Radtke A, Ehlert M, Jędrzejewski T, Bartmański M. The Morphology, Structure, Mechanical Properties and Biocompatibility of Nanotubular Titania Coatings before and after Autoclaving Process. J Clin Med 2019; 8:E272. [PMID: 30813448 PMCID: PMC6406720 DOI: 10.3390/jcm8020272] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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: 01/29/2019] [Revised: 02/20/2019] [Accepted: 02/20/2019] [Indexed: 12/18/2022] Open
Abstract
The autoclaving process is one of the sterilization procedures of implantable devices. Therefore, it is important to assess the impact of hot steam at high pressure on the morphology, structure, and properties of implants modified by nanocomposite coatings. In our works, we focused on studies on amorphous titania nanotubes produced by titanium alloy (Ti6Al4V) electrochemical oxidation in the potential range 5⁻60 V. Half of the samples were drying in argon stream at room temperature, and the second ones were drying additionally with the use of immersion in acetone and drying at 396 K. Samples were subjected to autoclaving and after sterilization they were structurally and morphologically characterized using Raman spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy (DRIFT) and scanning electron microscopy (SEM). They were characterized in terms of wettability, mechanical properties, and biocompatibility. Obtained results proved that the autoclaving of amorphous titania nanotube coatings produced at lower potentials (5⁻15 V) does not affect their morphology and structure regardless of the drying method before autoclaving. Nanotubular coatings produced using higher potentials (20⁻60 V) require removal of adsorbed water particles from their surface. Otherwise, autoclaving leads to the destruction of the architecture of nanotubular coatings, which is associated with the changing of their mechanical and biointegration properties.
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Affiliation(s)
- Aleksandra Radtke
- Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland.
- Nano-implant Ltd., Gagarina 5/102, 87-100 Toruń, Poland.
| | - Michalina Ehlert
- Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland.
- Nano-implant Ltd., Gagarina 5/102, 87-100 Toruń, Poland.
| | - Tomasz Jędrzejewski
- Faculty of Biology and Environmental Protection, Nicolaus Copernicus University in Toruń, Lwowska 1, 87-100 Toruń, Poland.
| | - Michał Bartmański
- Faculty of Mechanical Engineering, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland.
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243
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Ng S, Sopha H, Zazpe R, Spotz Z, Bijalwan V, Dvorak F, Hromadko L, Prikryl J, Macak JM. TiO 2 ALD Coating of Amorphous TiO 2 Nanotube Layers: Inhibition of the Structural and Morphological Changes Due to Water Annealing. Front Chem 2019; 7:38. [PMID: 30775363 PMCID: PMC6367259 DOI: 10.3389/fchem.2019.00038] [Citation(s) in RCA: 10] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Accepted: 01/14/2019] [Indexed: 12/02/2022] Open
Abstract
The present work presents a strategy to stabilize amorphous anodic self-organized TiO2 nanotube layers against morphological changes and crystallization upon extensive water soaking. The growth of needle-like nanoparticles was observed on the outer and inner walls of amorphous nanotube layers after extensive water soakings, in line with the literature on water annealing. In contrary, when TiO2 nanotube layers uniformly coated by thin TiO2 using atomic layer deposition (ALD) were soaked in water, the growth rates of needle-like nanoparticles were substantially reduced. We investigated the soaking effects of ALD TiO2 coatings with different thicknesses and deposition temperatures. Sufficiently thick TiO2 coatings (≈8.4 nm) deposited at different ALD process temperatures efficiently hamper the reactions between water and F− ions, maintain the amorphous state, and preserve the original tubular morphology. This work demonstrates the possibility of having robust amorphous 1D TiO2 nanotube layers that are very stable in water. This is very practical for diverse biomedical applications that are accompanied by extensive contact with an aqueous environment.
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Affiliation(s)
- Siowwoon Ng
- Central European Institute of Technology, Brno University of Technology, Brno, Czechia
| | - Hanna Sopha
- Central European Institute of Technology, Brno University of Technology, Brno, Czechia.,Faculty of Chemical Technology, Center of Materials and Nanotechnologies, University of Pardubice, Pardubice, Czechia
| | - Raul Zazpe
- Central European Institute of Technology, Brno University of Technology, Brno, Czechia.,Faculty of Chemical Technology, Center of Materials and Nanotechnologies, University of Pardubice, Pardubice, Czechia
| | - Zdenek Spotz
- Central European Institute of Technology, Brno University of Technology, Brno, Czechia
| | - Vijay Bijalwan
- Central European Institute of Technology, Brno University of Technology, Brno, Czechia
| | - Filip Dvorak
- Faculty of Chemical Technology, Center of Materials and Nanotechnologies, University of Pardubice, Pardubice, Czechia
| | - Ludek Hromadko
- Central European Institute of Technology, Brno University of Technology, Brno, Czechia.,Faculty of Chemical Technology, Center of Materials and Nanotechnologies, University of Pardubice, Pardubice, Czechia
| | - Jan Prikryl
- Faculty of Chemical Technology, Center of Materials and Nanotechnologies, University of Pardubice, Pardubice, Czechia
| | - Jan M Macak
- Central European Institute of Technology, Brno University of Technology, Brno, Czechia.,Faculty of Chemical Technology, Center of Materials and Nanotechnologies, University of Pardubice, Pardubice, Czechia
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244
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Moaied M, Hong J. Size-Dependent Critical Temperature and Anomalous Optical Dispersion in Ferromagnetic CrI₃ Nanotubes. Nanomaterials (Basel) 2019; 9:E153. [PMID: 30691119 DOI: 10.3390/nano9020153] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 01/15/2019] [Accepted: 01/21/2019] [Indexed: 11/17/2022]
Abstract
Using first principles calculations, we explored the magnetic and optical properties of chromium(III) iodide (CrI3) nanotubes (NTs) by changing their chirality and diameter. Here, we considered six types of NTs: (5,0), (5,5), (7,0), (10,0), (10,10), and (12,0) NTs. We found that both zigzag and armchair NTs had a ferromagnetic ground with a direct band gap, although the band gap was dependent on the chirality and diameter. Using the Monte Carlo simulation, we found that the Curie temperatures (Tc) exhibited chirality and diameter dependence. In zigzag NTs, the larger the tube diameter, the larger the Tc, while it decreased with increasing diameter in the armchair tube. We found that the Tc was almost doubled when the diameter increased two-fold. This finding may guide development of room temperature ferromagnetism in zigzag NTs. We also found that the CrI3 NTs displayed anisotropic optical properties and anomalous optical dispersion in the visible range. Specifically, the (10,0) zigzag NT had a large refractive index of 2 near the infrared region, while it became about 1.4 near blue light wavelengths. We also obtained large reflectivity in the ultraviolet region, which can be utilized for UV protection. Overall, we propose that the CrI3 NTs have multifunctional physical properties for spintronics and optical applications.
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245
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Li Y, Huang H, Chen S, Wang C, Ma T. Nanowire-Templated Synthesis of FeN x -Decorated Carbon Nanotubes as Highly Efficient, Universal-pH, Oxygen Reduction Reaction Catalysts. Chemistry 2019; 25:2637-2644. [PMID: 30600844 DOI: 10.1002/chem.201805716] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [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: 11/16/2018] [Revised: 12/05/2018] [Indexed: 12/29/2022]
Abstract
It is of increasing importance to develop highly active and economical oxygen reduction reaction (ORR) electrocatalysts, which have great significance for the large-scale implementation of various energy conversion systems, including metal-air batteries and fuel cells. Herein, a novel method to synthesize FeNx -decorated carbon nanotubes as a high-efficiency ORR catalyst, by utilizing ZnO nanowires as a sacrificial template and a Fe-polydopamine complex as metal and carbon sources, is reported. The obtained catalyst shows great potential for replacing Pt/C as the ORR catalyst under various pH conditions, from alkaline to acidic electrolytes. The high conductivity, large surface area of the carbon nanotube, and highly active FeNx species contributed greatly to the high performance of the catalyst. The work presented herein paves a new way for the synthesis of 1D porous nanomaterials for a broad range of energy-related applications.
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Affiliation(s)
- Yanqiang Li
- Institution State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin Campus, Panjin, 124221, P.R. China
| | - Huiyong Huang
- Institution State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin Campus, Panjin, 124221, P.R. China
| | - Siru Chen
- State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P.R. China
| | - Chao Wang
- Institution State Key Laboratory of Fine Chemicals, School of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin Campus, Panjin, 124221, P.R. China
| | - Tingli Ma
- Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu, Kitakyushu, Fukuoka, 808-0196, Japan
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246
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Radtke A, Ehlert M, Jędrzejewski T, Sadowska B, Więckowska-Szakiel M, Holopainen J, Ritala M, Leskelä M, Bartmański M, Szkodo M, Piszczek P. Titania Nanotubes/Hydroxyapatite Nanocomposites Produced with the Use of the Atomic Layer Deposition Technique: Estimation of Bioactivity and Nanomechanical Properties. Nanomaterials (Basel) 2019; 9:nano9010123. [PMID: 30669454 PMCID: PMC6359504 DOI: 10.3390/nano9010123] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [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: 12/21/2018] [Revised: 01/14/2019] [Accepted: 01/15/2019] [Indexed: 12/14/2022]
Abstract
Titanium dioxide nanotubes/hydroxyapatite nanocomposites were produced on a titanium alloy (Ti6Al4V/TNT/HA) and studied as a biocompatible coating for an implant surface modification. As a novel approach for this type of nanocomposite fabrication, the atomic layer deposition (ALD) method with an extremely low number of cycles was used to enrich titania nanotubes (TNT) with a very thin hydroxyapatite coating. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used for determination of the structure and the surface morphology of the fabricated nanocoatings. The biointegration activity of the layers was estimated based on fibroblasts’ proliferation on the TNT/HA surface. The antibacterial activity was determined by analyzing the ability of the layers to inhibit bacterial colonization and biofilm formation. Mechanical properties of the Ti6Al4V/TNT/HA samples were estimated by measuring the hardness, Young’s module, and susceptibility to scratching. The results revealed that the nanoporous titanium alloy coatings enriched with a very thin hydroxyapatite layer may be a promising way to achieve the desired balance between biofunctional and biomechanical properties of modern implants.
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Affiliation(s)
- Aleksandra Radtke
- Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland.
- Nano-implant Ltd. Gagarina 5, 87-100 Toruń, Poland.
| | - Michalina Ehlert
- Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland.
- Nano-implant Ltd. Gagarina 5, 87-100 Toruń, Poland.
| | - Tomasz Jędrzejewski
- Faculty of Biology and Environmental Protection, Nicolaus Copernicus University in Toruń, Lwowska 1, 87-100 Toruń, Poland.
| | - Beata Sadowska
- Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237 Łódź, Poland.
| | - Marzena Więckowska-Szakiel
- Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237 Łódź, Poland.
| | - Jani Holopainen
- Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, 00014 Helsinki, Finland.
| | - Mikko Ritala
- Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, 00014 Helsinki, Finland.
| | - Markku Leskelä
- Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, 00014 Helsinki, Finland.
| | - Michał Bartmański
- Faculty of Mechanical Engineering, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland.
| | - Marek Szkodo
- Faculty of Mechanical Engineering, Gdańsk University of Technology, Gabriela Narutowicza 11/12, 80-233 Gdańsk, Poland.
| | - Piotr Piszczek
- Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100 Toruń, Poland.
- Nano-implant Ltd. Gagarina 5, 87-100 Toruń, Poland.
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247
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Sun Z, Mio T, Okada T, Matsuno T, Sato S, Kono H, Isobe H. Unbiased Rotational Motions of an Ellipsoidal Guest in a Tight Yet Pliable Host. Angew Chem Int Ed Engl 2019; 58:2040-2044. [PMID: 30549181 DOI: 10.1002/anie.201812771] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [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: 11/06/2018] [Indexed: 11/09/2022]
Abstract
In the design of machinery such as steel bearings, a fundamental understanding of material characteristics provides an indispensable basis for the design. Although hydrocarbon cycloarylenes have started to be used for providing unique supramolecular bearings with anomalous dynamic behaviors, their fundamental understanding is immature. A unique property of the cycloarylene host is now reported: the cyclic host is so pliable that it tracks the orientational changes of the ellipsoidal guest, that is, C70 fullerene. Unique structures of the complex were revealed by spectroscopic and crystallographic analyses, and additional theoretical investigations deepened our understanding by revealing the structural changes associated with unbiased rotational motions.
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Affiliation(s)
- Zhe Sun
- Department of Chemistry, The University of Tokyo, JST, ERATO, Isobe Degenerate π-Integration Project, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.,Present address: Institute of Molecular Plus, Tianjin University, No. 11 Building, No. 92 Weijin Road, Nankai District, Tianjin, 300072, P. R. China
| | - Tatsuru Mio
- Department of Chemistry, The University of Tokyo, JST, ERATO, Isobe Degenerate π-Integration Project, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Tomohiko Okada
- Department of Chemistry, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan
| | - Taisuke Matsuno
- Department of Chemistry, The University of Tokyo, JST, ERATO, Isobe Degenerate π-Integration Project, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Sota Sato
- Department of Chemistry, The University of Tokyo, JST, ERATO, Isobe Degenerate π-Integration Project, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Hirohiko Kono
- Department of Chemistry, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan
| | - Hiroyuki Isobe
- Department of Chemistry, The University of Tokyo, JST, ERATO, Isobe Degenerate π-Integration Project, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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248
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Wu S, Zhang D, Bai J, Du W, Duan Y, Liu Y, Zou X, Ouyang H, Gao C. Temperature-Gating Titania Nanotubes Regulate Migration of Endothelial Cells. ACS Appl Mater Interfaces 2019; 11:1254-1266. [PMID: 30525390 DOI: 10.1021/acsami.8b17530] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
External stimuli-responsive biomaterials represent a type of promising candidates for addressing the complexity of biological systems. In this study, a platform based on the combination of temperature-sensitive polymers and a nanotube array was developed for loading sphingosine 1-phosphate (S1P) and regulating the migration of endothelial cells (ECs) at desired conditions. The localized release dosage of effectors could be controlled by the change of environmental temperature. At a culture temperature above the lower critical solution temperature, the polymer "gatekeeper" with a collapsed conformation allowed the release of S1P, which in turn enhanced the migration of ECs. The migration rate of single cells was significantly enhanced up to 58.5%, and the collective migration distance was also promoted to 25.1% at 24 h and 33.2% at 48 h. The cell morphology, focal adhesion, organization of cytoskeleton, and expression of genes and proteins related to migration were studied to unveil the intrinsic mechanisms. The cell mobility was regulated by the released S1P, which would bind with the S1PR1 receptor on the cell membrane and trigger the Rho GTPase pathway.
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Affiliation(s)
| | | | | | | | | | | | | | - Hongwei Ouyang
- Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine , Zhejiang University , Hangzhou 310058 , China
| | - Changyou Gao
- Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine , Zhejiang University , Hangzhou 310058 , China
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249
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Abstract
Liquid crystal phases formed from bent-core mesogens have attracted much interest of the liquid crystal research community, due to the manifestation of chirality effects from achiral molecules. One of the most elusive of the bent-core phases is the B7 phase, which at its early stage often forms in a helical filament fashion. We investigate the growth of such filaments in the presence of single-walled nanotubes to elucidate possible effects on the growth dynamics and helicity of B7 helical filaments. It is found that the filament width slightly decreases in comparison to the neat B7 material, suggesting a more tightly bound structure around the nanotubes, with the nanotubes likely acting as the core of the helical filament. No effects on pitch or periodicity of the helical superstructure is observed. The filament growth velocity quickly decreases as nanotubes are added to the B7 phase, indicating that a more tightly bound structure needs a longer time of formation. An observed buckling instability is of interest as a microscopic example for the study of nonlinear dynamics theories of filaments. The present investigation is thus of general importance for nanoparticle directed growth of filaments, which has applications in biomolecular growth and high tensile strength fibres.
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Affiliation(s)
- O Stamatoiu
- School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M139PL, United Kingdom.,Faculty of Physics, West University of Timisoara, 4 Vasile Pârvan Str., Timisoara, 300223, Romania
| | - I Dierking
- School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M139PL, United Kingdom
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250
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Kuroda K, Yazaki K, Tanaka Y, Akita M, Sakai H, Hasobe T, Tkachenko NV, Yoshizawa M. A Pentacene-based Nanotube Displaying Enriched Electrochemical and Photochemical Activities. Angew Chem Int Ed Engl 2018; 58:1115-1119. [PMID: 30496630 DOI: 10.1002/anie.201812976] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [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: 11/12/2018] [Indexed: 01/08/2023]
Abstract
Unlike previously well-studied, acyclic pentacene oligomers, the first synthesis of a cyclic pentacene trimer with a fixed tubular conformation is reported. A short-step synthesis starting from common pentacenequinone yielded the target molecule with a 1.5 nanometer length and a subnanometer pore. Steady-state spectroscopic analyses revealed that the close proximity of the non-conjugated, three pentacene chromophores allows the nanotube to display stepwise electrochemical/chemical oxidation characteristics. Furthermore, time-resolved transient absorption measurements elucidated the generation of an excited triplet state of the nanotube, with high quantum yield reaching about 180 % through intramolecular singlet fission and a very long triplet lifetime.
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Affiliation(s)
- Kiyonori Kuroda
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Kohei Yazaki
- Faculty of Engineering, University of Yamanashi, 4-3-11 Takeda, Kofu, 400-8511, Japan
| | - Yuya Tanaka
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Munetaka Akita
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Hayato Sakai
- Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan
| | - Taku Hasobe
- Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan
| | - Nikolai V Tkachenko
- Laboratory of Chemistry and Bioengineering, Tampere University of Technology, 33720, Tampere, Finland
| | - Michito Yoshizawa
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
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