1
|
Valenzuela-Hernandez G, Berman-Mendoza D, Rangel R, Vazquez J, Bohorquez C, Contreras OE, Carrillo R, García-Gutierrez R, Ramos-Carrazco A. Ammonia thermally treated gallium nitride deposited on gold-nucleation sites. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02520-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
2
|
Muravitskaya A, Gokarna A, Movsesyan A, Kostcheev S, Rumyantseva A, Couteau C, Lerondel G, Baudrion AL, Gaponenko S, Adam PM. Refractive index mediated plasmon hybridization in an array of aluminium nanoparticles. NANOSCALE 2020; 12:6394-6402. [PMID: 32140696 DOI: 10.1039/c9nr09393a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The arrangement of plasmonic nanoparticles in a non-symmetrical environment can feature far-field and/or near-field interactions depending on the distance between the objects. In this work, we study the hybridization of three intrinsic plasmonic modes (dipolar, quadrupolar and hexapolar modes) sustained by one elliptical aluminium nanocylinder, as well as behavior of the hybridized modes when the nanoparticles are organized in arrays or when the refractive index of the surrounding medium is changed. The position and the intensity of these hybridized modes were shown to be affected by the near-field and far-field interactions between the nanoparticles. In this work, two hybridized modes were tuned in the UV spectral range to spectrally coincide with the intrinsic interband excitation and emission bands of ZnO nanocrystals. The refractive index of the ZnO nanocrystal layer influences the positions of the plasmonic modes and increases the role of the superstrate medium, which in turn results in the appearance of two separate modes in the small spectral region. Hence, the enhancement of ZnO nanocrystal photoluminescence benefits from the simultaneous excitation and emission enhancements.
Collapse
Affiliation(s)
- Alina Muravitskaya
- Laboratory Light, Nanomaterials & Nanotechnologies (L2n), CNRS ERL 7004, University of Technology of Troyes, 12 rue Marie Curie, 10004 Troyes Cedex, France.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
3
|
Wang CC, Chen KC, Shieu FS, Shih HC. Characterization and photoluminescence of V2O5@Pt core-shell nanostructures as fabricated by atomic layer deposition. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.05.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
4
|
Yang X, Zhang C, Li A, Wang J, Cai X. Red fluorescent ZnO nanoparticle grafted with polyglycerol and conjugated RGD peptide as drug delivery vehicles for efficient target cancer therapy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 95:104-113. [PMID: 30573230 DOI: 10.1016/j.msec.2018.10.066] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 09/29/2018] [Accepted: 10/18/2018] [Indexed: 12/14/2022]
Abstract
In the field of modern nanomedicine, ZnO nanoparticles were considered as an emerging candidate for drug delivery because of their inherent biocompatibility and stability. However, the poor dispersibility in a physiological medium obstructed their clinic applications. In this paper, the red fluorescence ZnO nanoparticles were synthesized, using a facile chemical method of polyol in boiling trimethylene glycol (TREG) with zinc acetate. The as-synthesized ZnO nanoparticles were first time grafted with PG layer through ring-opening polymerization of glycidol (ZnO-PG). As calculated from the TGA data, the weight ratio of the grafted PG was about 68 wt%. Then, the ZnO-PG engineered to conjugate with arginine-glycine-aspartate (RGD) peptide by stepwise organic reactions. Finally, anticancer drugs Doxorubicin hydrochloride (DOX) was immobilized on ZnO-PG-RGD (approximately 21.8 ± 0.9 nm) to form ZnO-PG-RGD/DOX. The drug release percentage reaches 70.6% within 48 h under pH 5.2, which was more than 3-fold higher than that pH 7.4. The properties of ZnO nanoparticles and its derivatives were detected by power XRD, TEM, EDS, FTIR, TGA, DLS, Zeta potential and UV. The grafted PG layer not only largely enhanced the dispersibility, but also inhibited ZnO nanoparticles from the uptake by U87MG and Hela cells. In contrast, ZnO-PG-RGD was selectively taken up by U87MG, not Hela cells, demonstrating an obvious targeting property. When ZnO-PG-RGD/DOX was used, U87MG cells showed specificity damaged compared with Hela cells. Thus, functionalized ZnO nanoparticle was a promising nanomaterial in cancer theranostics.
Collapse
Affiliation(s)
- Xiaoxin Yang
- Guangdong Engineering & Technology Research Center of Topic Precise Drug Delivery System, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, PR China
| | - Chuang Zhang
- Guangdong Engineering & Technology Research Center of Topic Precise Drug Delivery System, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, PR China
| | - Anxia Li
- Guangdong Engineering & Technology Research Center of Topic Precise Drug Delivery System, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, PR China
| | - Jie Wang
- Guangdong Engineering & Technology Research Center of Topic Precise Drug Delivery System, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, PR China
| | - Xiulan Cai
- Guangdong Engineering & Technology Research Center of Topic Precise Drug Delivery System, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, PR China.
| |
Collapse
|
5
|
Zhou Y, Chen S, Pan X, Ye Z. Photoluminescence enhancement in non-polar ZnO films through metallodielectric mediated Al surface plasmons. OPTICS LETTERS 2018; 43:2288-2291. [PMID: 29762574 DOI: 10.1364/ol.43.002288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 04/09/2018] [Indexed: 06/08/2023]
Abstract
Non-polar ZnO thin films are grown on m-plane sapphire substrates by plasma-assisted molecular beam epitaxy. Emission enhancement from non-polar ZnO thin films coated with Al/AlOx has been studied by photoluminescence spectroscopy. AlOx has been used to mediate the surface plasmon (SP) energy of Al nanoparticles. Taking advantage of the resonant coupling between the UV emission of non-polar ZnO film and Al nanoparticle SPs, an 84-fold enhancement of the UV emission and an 8.3-fold enhancement of internal quantum efficiency (ηint) have been achieved under the optimized sputtering time and energy of SPs.
Collapse
|
6
|
Qin FF, Xu CX, Zhu QX, Lu JF, You DT, Xu W, Zhu Z, Manohari AG, Chen F. Extra green light induced ZnO ultraviolet lasing enhancement assisted by Au surface plasmons. NANOSCALE 2018; 10:623-627. [PMID: 29235608 DOI: 10.1039/c7nr07846c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We observed the dramatic enhancement of the intrinsic spontaneous and stimulated emission as well as the ensuing suppression of defect-related green emission in Au-decorated ZnO microrods. A series of spectral experiments and theoretical analysis demonstrated an electron transfer assisted process by surface plasmon (SP) resonant coupling between the Au nanoparticles and ZnO. The mechanism indicates an approach to enhance the UV emission of ZnO through an extra excitation of visible light similar to that for the defect emission of ZnO. Based on the coupling mechanism, the externally enhanced ultraviolet lasing was further improved from 1.5 to 2.8-fold by adjusting the pumping power of the green light intensity in the Au/ZnO hybrid cavity. This research not only further confirms the SPR-assisted electron transfer process but also offers an approach to improve the intrinsic UV emission even for heavily-defected ZnO through visible light excitation via a nonlinear process.
Collapse
Affiliation(s)
- F F Qin
- State Key Laboratory of Bioelectronics, School of physics, Southeast University, Nanjing 210096, P. R. China.
| | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Zhou Y, Chen S, Pan X, Ye Z. Great photoluminescence enhancement in Al-sputtered Zn 0.78Mg 0.22O films. OPTICS LETTERS 2017; 42:5129-5132. [PMID: 29240154 DOI: 10.1364/ol.42.005129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 11/08/2017] [Indexed: 06/07/2023]
Abstract
Zn0.78Mg0.22O thin films were grown on a-plane sapphire substrates by plasma-assisted molecular beam epitaxy. Compared with ZnO, the crystal quality of Zn0.78Mg0.22O thin films degrades significantly, which results in low internal quantum efficiency (ηint). Besides improving the quality of Zn0.78Mg0.22O, an effective method has been used to enhance the internal quantum efficiency and the UV emission of Zn0.78Mg0.22O by sputtering Al nanoparticles. Taking advantage of the resonant coupling between UV emission of Zn0.78Mg0.22O film and Al nanoparticle surface plasmons (SPs), a 59-fold enhancement of the UV emission and a 3.5-fold enhancement of ηint has been achieved under the optimized sputtering time. Moreover, the enhancement ratio is stable after two months. It paves a facile way in fabricating high-efficiency UV optoelectronic devices.
Collapse
|
8
|
Bouazizi N, Boudharaa T, Bargougui R, Vieillard J, Ammar S, Le Derf F, Azzouz A. Synthesis and properties of ZnO-HMD@ZnO-Fe/Cu core-shell as advanced material for hydrogen storage. J Colloid Interface Sci 2017; 491:89-97. [PMID: 28012917 DOI: 10.1016/j.jcis.2016.12.024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/10/2016] [Accepted: 12/13/2016] [Indexed: 10/20/2022]
Abstract
In this paper, a new synthetic strategy towards functionalized ZnO-HMD@ZnO-Fe/Cu core-shell using sol-gel process modified by chemical grafting of hexamethylenediamine (HMD) on the core and in-situ dispersion of Cu0/Fe0 as metallic nanoparticles (M-NPs) on the shell. The as-prepared core-shell materials were fully characterized by transmission electron microscopy, X-ray powder diffractometry, diffuse reflectance and FT-IR spectrophotometery, photoluminescence, and complexes impedance spectroscopy measurements. The XRD patterns agreed with that of the ZnO typical wurtzite structure, indicating good crystallinity of ZnO-HMD@ZnO-Fe/Cu, with the presence of Fe0 and Cu0 phases. Hexamethylenediamine grafting and M-NPs insertion were highly activated and enhanced the core and shell interface by the physiochemical interaction. After functionalization, luminescence intensities and electrical properties of both core and core-shell nanoparticles are improved, indicating the effects of the surface groups on the charge transfer of ZnO-HMD@ZnO-Fe/Cu. The hydrogen capacity retention was depended strongly on the composition and structure of the obtained core-shell. Iron/Copper-loaded ZnO-HMD@ZnO materials exhibited the highest capacity for hydrogen storage. The excellent stability and performance of the ZnO-HMD@ZnO-Fe/Cu core-shell make it an efficient candidate for hydrogen storage.
Collapse
Affiliation(s)
- N Bouazizi
- Research Unit: Environment, Catalyzes and Process Analysis, ENIG, University of Gabes, Tunisia; Normandie Université, COBRA, UMR6014 et FR3038, Université de Rouen, INSA de Rouen, CNRS, 55, rue Saint Germain, 27000 Evreux, France; Nanoqam, Department of Chemistry, University of Quebec at Montreal, QC H3C 3P8, Canada.
| | - T Boudharaa
- Useful Materials Valaorization Laboratory, Borj Cedria, Tunis, Tunisia
| | - R Bargougui
- Normandie Université, COBRA, UMR6014 et FR3038, Université de Rouen, INSA de Rouen, CNRS, 55, rue Saint Germain, 27000 Evreux, France
| | - J Vieillard
- Normandie Université, COBRA, UMR6014 et FR3038, Université de Rouen, INSA de Rouen, CNRS, 55, rue Saint Germain, 27000 Evreux, France.
| | - S Ammar
- Department of Chemistry, Faculty of Sciences, University of Gabes, Tunisia
| | - F Le Derf
- Normandie Université, COBRA, UMR6014 et FR3038, Université de Rouen, INSA de Rouen, CNRS, 55, rue Saint Germain, 27000 Evreux, France
| | - A Azzouz
- Nanoqam, Department of Chemistry, University of Quebec at Montreal, QC H3C 3P8, Canada.
| |
Collapse
|
9
|
Abbass AE, Swart H, Kroon R. Non-plasmonic enhancement of the near band edge luminescence from ZnO using Ag nanoparticles. JOURNAL OF LUMINESCENCE 2017; 182:263-267. [DOI: 10.1016/j.jlumin.2016.10.043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
|
10
|
Yang X, Xu X, Liu F, Zhang L, Ji Z, Chen Q, Cao B. Fabrication of p-ZnO:Na/n-ZnO:Na homojunction by surface pulsed laser irradiation. RSC Adv 2017. [DOI: 10.1039/c7ra05574a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An ingenious method of preparation of ZnO homojunctions for on-chip integration purposes is proposed, by local multiple pulse laser irradiating (MPLI) ZnO:Na film (NZO).
Collapse
Affiliation(s)
- Xiaopeng Yang
- Materials Research Center for Energy and Photoelectrochemical Conversion
- School of Material Science and Engineering
- University of Jinan
- Jinan 250022
- China
| | - Xiang Xu
- Materials Research Center for Energy and Photoelectrochemical Conversion
- School of Material Science and Engineering
- University of Jinan
- Jinan 250022
- China
| | - Feng Liu
- Materials Research Center for Energy and Photoelectrochemical Conversion
- School of Material Science and Engineering
- University of Jinan
- Jinan 250022
- China
| | - Liqiang Zhang
- State Key Laboratory of Heavy Oil Processing
- Department of Materials Science and Engineering
- China University of Petroleum
- Beijing 102249
- China
| | - Ziwu Ji
- School of Physics
- Shandong University
- Jinan 250100
- China
| | - Qifeng Chen
- Materials Research Center for Energy and Photoelectrochemical Conversion
- School of Material Science and Engineering
- University of Jinan
- Jinan 250022
- China
| | - Bingqiang Cao
- Materials Research Center for Energy and Photoelectrochemical Conversion
- School of Material Science and Engineering
- University of Jinan
- Jinan 250022
- China
| |
Collapse
|
11
|
Qin F, Chang N, Xu C, Zhu Q, Wei M, Zhu Z, Chen F, Lu J. Underlying mechanism of blue emission enhancement in Au decorated p-GaN film. RSC Adv 2017. [DOI: 10.1039/c7ra01193h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Our research explains the defect-related LSP generation, coupling, electron transfer, and further light emission enhancement of Au decorated GaN.
Collapse
Affiliation(s)
- Feifei Qin
- State Key Laboratory of Bioelectronics
- Department of Physics
- Southeast University
- Nanjing 210096
- P. R. China
| | - Ning Chang
- State Key Laboratory of Bioelectronics
- Department of Physics
- Southeast University
- Nanjing 210096
- P. R. China
| | - Chunxiang Xu
- State Key Laboratory of Bioelectronics
- Department of Physics
- Southeast University
- Nanjing 210096
- P. R. China
| | - Qiuxiang Zhu
- State Key Laboratory of Bioelectronics
- Department of Physics
- Southeast University
- Nanjing 210096
- P. R. China
| | - Ming Wei
- State Key Laboratory of Bioelectronics
- Department of Physics
- Southeast University
- Nanjing 210096
- P. R. China
| | - Zhu Zhu
- State Key Laboratory of Bioelectronics
- Department of Physics
- Southeast University
- Nanjing 210096
- P. R. China
| | - Feng Chen
- State Key Laboratory of Bioelectronics
- Department of Physics
- Southeast University
- Nanjing 210096
- P. R. China
| | - Junfeng Lu
- State Key Laboratory of Bioelectronics
- Department of Physics
- Southeast University
- Nanjing 210096
- P. R. China
| |
Collapse
|
12
|
Perumal V, Hashim U, Gopinath SCB, Rajintra Prasad H, Wei-Wen L, Balakrishnan SR, Vijayakumar T, Rahim RA. Characterization of Gold-Sputtered Zinc Oxide Nanorods-a Potential Hybrid Material. NANOSCALE RESEARCH LETTERS 2016; 11:31. [PMID: 26787050 PMCID: PMC4718909 DOI: 10.1186/s11671-016-1245-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 01/06/2016] [Indexed: 06/05/2023]
Abstract
Generation of hybrid nanostructures has been attested as a promising approach to develop high-performance sensing substrates. Herein, hybrid zinc oxide (ZnO) nanorod dopants with different gold (Au) thicknesses were grown on silicon wafer and studied for their impact on physical, optical and electrical characteristics. Structural patterns displayed that ZnO crystal lattice is in preferred c-axis orientation and proved the higher purities. Observations under field emission scanning electron microscopy revealed the coverage of ZnO nanorods by Au-spots having diameters in the average ranges of 5-10 nm, as determined under transmission electron microscopy. Impedance spectroscopic analysis of Au-sputtered ZnO nanorods was carried out in the frequency range of 1 to 100 MHz with applied AC amplitude of 1 V RMS. The obtained results showed significant changes in the electrical properties (conductance and dielectric constant) with nanostructures. A clear demonstration with 30-nm thickness of Au-sputtering was apparent to be ideal for downstream applications, due to the lowest variation in resistance value of grain boundary, which has dynamic and superior characteristics.
Collapse
Affiliation(s)
- Veeradasan Perumal
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis, 01000, Kangar, Perlis, Malaysia.
| | - Uda Hashim
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis, 01000, Kangar, Perlis, Malaysia
| | - Subash C B Gopinath
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis, 01000, Kangar, Perlis, Malaysia
- School of Bioprocess Engineering, Universiti Malaysia Perlis, 02600, Arau, Perlis, Malaysia
| | - Haarindraprasad Rajintra Prasad
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis, 01000, Kangar, Perlis, Malaysia
| | - Liu Wei-Wen
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis, 01000, Kangar, Perlis, Malaysia
| | - S R Balakrishnan
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis, 01000, Kangar, Perlis, Malaysia
| | - Thivina Vijayakumar
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis, 01000, Kangar, Perlis, Malaysia
| | - Ruslinda Abdul Rahim
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis, 01000, Kangar, Perlis, Malaysia
| |
Collapse
|
13
|
Chen C, Chen J, Zhang J, Wang S, Zhang W, Liang R, Dai J, Chen C. Ag-Decorated Localized Surface Plasmon-Enhanced Ultraviolet Electroluminescence from ZnO Quantum Dot-Based/GaN Heterojunction Diodes by Optimizing MgO Interlayer Thickness. NANOSCALE RESEARCH LETTERS 2016; 11:480. [PMID: 27797089 PMCID: PMC5085967 DOI: 10.1186/s11671-016-1701-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 10/21/2016] [Indexed: 06/06/2023]
Abstract
We demonstrate the fabrication and characterization of localized surface plasmon (LSP)-enhanced n-ZnO quantum dot (QD)/MgO/p-GaN heterojunction light-emitting diodes (LEDs) by embedding Ag nanoparticles (Ag-NPs) into the ZnO/MgO interface. The maximum enhancement ration of the Ag-NP-decorated LEDs in electroluminescence (EL) is 4.3-fold by optimizing MgO electron-blocking layer thickness. The EL origination was investigated qualitatively in terms of photoluminescence (PL) results. Through analysis of the energy band structure of device and carrier transport mechanisms, it suggests that the EL enhancement is attributed to the increased rate of spontaneous emission and improved internal quantum efficiency induced by exciton-LSP coupling.
Collapse
Affiliation(s)
- Cheng Chen
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China
| | - Jingwen Chen
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China
| | - Jun Zhang
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China
| | - Shuai Wang
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China
| | - Wei Zhang
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China
| | - Renli Liang
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China
| | - Jiangnan Dai
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China.
| | - Changqing Chen
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, Hubei, People's Republic of China
| |
Collapse
|
14
|
Thein MT, Pung SY, Aziz A, Itoh M. Effect of Ni coupling on the photoluminescence property and photocatalytic activity of ZnO nanorods. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2015.11.024] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
15
|
Bertoni G, Fabbri F, Villani M, Lazzarini L, Turner S, Van Tendeloo G, Calestani D, Gradečak S, Zappettini A, Salviati G. Nanoscale mapping of plasmon and exciton in ZnO tetrapods coupled with Au nanoparticles. Sci Rep 2016; 6:19168. [PMID: 26754789 PMCID: PMC4709633 DOI: 10.1038/srep19168] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 11/26/2015] [Indexed: 11/29/2022] Open
Abstract
Metallic nanoparticles can be used to enhance optical absorption or emission in semiconductors, thanks to a strong interaction of collective excitations of free charges (plasmons) with electromagnetic fields. Herein we present direct imaging at the nanoscale of plasmon-exciton coupling in Au/ZnO nanostructures by combining scanning transmission electron energy loss and cathodoluminescence spectroscopy and mapping. The Au nanoparticles (~30 nm in diameter) are grown in-situ on ZnO nanotetrapods by means of a photochemical process without the need of binding agents or capping molecules, resulting in clean interfaces. Interestingly, the Au plasmon resonance is localized at the Au/vacuum interface, rather than presenting an isotropic distribution around the nanoparticle. On the contrary, a localization of the ZnO signal has been observed inside the Au nanoparticle, as also confirmed by numerical simulations.
Collapse
Affiliation(s)
| | - Filippo Fabbri
- CNR-IMEM, Parco Area delle Scienze 37/A, IT 43124 Parma, Italy
| | - Marco Villani
- CNR-IMEM, Parco Area delle Scienze 37/A, IT 43124 Parma, Italy
| | - Laura Lazzarini
- CNR-IMEM, Parco Area delle Scienze 37/A, IT 43124 Parma, Italy
| | - Stuart Turner
- EMAT, University of Antwerp, Groenenborgerlaan 171, BE 2020 Antwerp, Belgium
| | | | | | - Silvija Gradečak
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts (USA)
| | | | | |
Collapse
|
16
|
Perumal V, Hashim U, Gopinath SCB, Haarindraprasad R, Liu WW, Poopalan P, Balakrishnan SR, Thivina V, Ruslinda AR. Thickness Dependent Nanostructural, Morphological, Optical and Impedometric Analyses of Zinc Oxide-Gold Hybrids: Nanoparticle to Thin Film. PLoS One 2015; 10:e0144964. [PMID: 26694656 PMCID: PMC4687870 DOI: 10.1371/journal.pone.0144964] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 11/26/2015] [Indexed: 11/25/2022] Open
Abstract
The creation of an appropriate thin film is important for the development of novel sensing surfaces, which will ultimately enhance the properties and output of high-performance sensors. In this study, we have fabricated and characterized zinc oxide (ZnO) thin films on silicon substrates, which were hybridized with gold nanoparticles (AuNPs) to obtain ZnO-Aux (x = 10, 20, 30, 40 and 50 nm) hybrid structures with different thicknesses. Nanoscale imaging by field emission scanning electron microscopy revealed increasing film uniformity and coverage with the Au deposition thickness. Transmission electron microscopy analysis indicated that the AuNPs exhibit an increasing average diameter (5–10 nm). The face center cubic Au were found to co-exist with wurtzite ZnO nanostructure. Atomic force microscopy observations revealed that as the Au content increased, the overall crystallite size increased, which was supported by X-ray diffraction measurements. The structural characterizations indicated that the Au on the ZnO crystal lattice exists without any impurities in a preferred orientation (002). When the ZnO thickness increased from 10 to 40 nm, transmittance and an optical bandgap value decreased. Interestingly, with 50 nm thickness, the band gap value was increased, which might be due to the Burstein-Moss effect. Photoluminescence studies revealed that the overall structural defect (green emission) improved significantly as the Au deposition increased. The impedance measurements shows a decreasing value of impedance arc with increasing Au thicknesses (0 to 40 nm). In contrast, the 50 nm AuNP impedance arc shows an increased value compared to lower sputtering thicknesses, which indicated the presence of larger sized AuNPs that form a continuous film, and its ohmic characteristics changed to rectifying characteristics. This improved hybrid thin film (ZnO/Au) is suitable for a wide range of sensing applications.
Collapse
Affiliation(s)
- Veeradasan Perumal
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis (UniMAP), Kangar, Perlis, Malaysia
| | - Uda Hashim
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis (UniMAP), Kangar, Perlis, Malaysia.,School of Microelectronic Engineering, University Malaysia Perlis (UniMAP), Kuala Perlis, Perlis, Malaysia
| | - Subash C B Gopinath
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis (UniMAP), Kangar, Perlis, Malaysia.,School of Bioprocess Engineering, Universiti Malaysia Perlis (UniMAP), Arau, Perlis, Malaysia
| | - R Haarindraprasad
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis (UniMAP), Kangar, Perlis, Malaysia
| | - Wei-Wen Liu
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis (UniMAP), Kangar, Perlis, Malaysia
| | - P Poopalan
- School of Microelectronic Engineering, University Malaysia Perlis (UniMAP), Kuala Perlis, Perlis, Malaysia
| | - S R Balakrishnan
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis (UniMAP), Kangar, Perlis, Malaysia
| | - V Thivina
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis (UniMAP), Kangar, Perlis, Malaysia
| | - A R Ruslinda
- Biomedical Nano Diagnostics Research Group, Institute of Nano Electronic Engineering (INEE), Universiti Malaysia Perlis (UniMAP), Kangar, Perlis, Malaysia
| |
Collapse
|
17
|
Guidelli EJ, Baffa O, Clarke DR. Enhanced UV Emission From Silver/ZnO And Gold/ZnO Core-Shell Nanoparticles: Photoluminescence, Radioluminescence, And Optically Stimulated Luminescence. Sci Rep 2015; 5:14004. [PMID: 26365945 PMCID: PMC5155625 DOI: 10.1038/srep14004] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Accepted: 08/06/2015] [Indexed: 11/26/2022] Open
Abstract
The optical properties of core-shell nanoparticles consisting of a ZnO shell grown on Ag and Au nanoparticle cores by a solution method have been investigated. Both the ZnO/Ag and ZnO/Au particles exhibit strongly enhanced near-band-edge UV emission from the ZnO when excited at 325 nm. Furthermore, the UV intensity increases with the metal nanoparticle concentration, with 60-fold and 17-fold enhancements for the ZnO/Ag and ZnO/Au, core-shell nanoparticles respectively. Accompanying the increase in UV emission, there is a corresponding decrease in the broad band defect emission with nanoparticle concentration. Nonetheless, the broad band luminescence increases with laser power. The results are consistent with enhanced exciton emission in the ZnO shells due to coupling with surface plasmon resonance of the metal nanoparticles. Luminescence measurements during and after exposure to X-rays also exhibit enhanced UV luminescence. These observations suggest that metal nanoparticles may be suitable for enhancing optical detection of ionizing radiation.
Collapse
Affiliation(s)
- E J Guidelli
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138.,Departamento de Física - FFCLRP- Universidade de São Paulo, Brazil
| | - O Baffa
- Departamento de Física - FFCLRP- Universidade de São Paulo, Brazil
| | - D R Clarke
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138
| |
Collapse
|
18
|
Chen S, Pan X, He H, Chen W, Dai W, Chen C, Zhang H, Ding P, Huang J, Lu B, Lu J, Ye Z. 60-fold photoluminescence enhancement in Pt nanoparticle-coated ZnO films: role of surface plasmon coupling and conversion of non-radiative recombination. OPTICS LETTERS 2015; 40:2782-2785. [PMID: 26076261 DOI: 10.1364/ol.40.002782] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Giant 60-fold enhanced ultraviolet (UV) emission is obtained in Pt nanoparticle-assembled ZnO film. Besides surface plasmons coupling, the conversion of non-radiative recombination into UV emission makes great contributions to the enhancement. It paves a new way in designing high-efficiency UV optoelectronic devices without defect-related energy loss.
Collapse
|
19
|
Chen S, Pan X, He H, Chen W, Chen C, Dai W, Zhang H, Ding P, Huang J, Lu B, Ye Z. Enhanced photoluminescence of nonpolar p-type ZnO film by surface plasmon resonance and electron transfer. OPTICS LETTERS 2015; 40:649-652. [PMID: 25680172 DOI: 10.1364/ol.40.000649] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Nonpolar oriented Na-doped ZnO films were grown on m-plane sapphire substrates by plasma-assisted molecular beam epitaxy. The films show repeatable p-type conductivity with a hole concentration of about 3.0×10(16) cm(-3) as identified by the Hall-effect measurements. 10-fold enhancement in the near-band-edge (NBE) emission of the nonpolar p-type ZnO by employing Pt nanoparticle surface plasmons has been observed. In addition, the deep level emission has been entirely suppressed. The underlying mechanism behind the enhancement of NBE emission and the quenching of defect emission is a combination of the electron transfer and the resonant coupling between NBE emission and Pt nanoparticle surface plasmons.
Collapse
|
20
|
Hong H, Wang F, Zhang Y, Graves SA, Eddine SBZ, Yang Y, Theuer CP, Nickles RJ, Wang X, Cai W. Red fluorescent zinc oxide nanoparticle: a novel platform for cancer targeting. ACS APPLIED MATERIALS & INTERFACES 2015; 7:3373-81. [PMID: 25607242 PMCID: PMC4326560 DOI: 10.1021/am508440j] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Multifunctional zinc oxide (ZnO) nanoparticles (NPs) with well-integrated multimodality imaging capacities have generated increasing research interest in the past decade. However, limited progress has been made in developing ZnO NP-based multimodality tumor-imaging agents. Here we developed novel red fluorescent ZnO NPs and described the successful conjugation of 64Cu (t1/2=12.7 h) and TRC105, a chimeric monoclonal antibody against CD105, to these ZnO NPs via well-developed surface engineering procedures. The produced dual-modality ZnO NPs were readily applicable for positron emission tomography (PET) imaging and fluorescence imaging of the tumor vasculature. Their pharmacokinetics and tumor-targeting efficacy/specificity in mice bearing murine breast 4T1 tumor were thoroughly investigated. ZnO NPs with dual-modality imaging properties can serve as an attractive candidate for future cancer theranostics.
Collapse
Affiliation(s)
- Hao Hong
- Department of Radiology, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
| | - Fei Wang
- Department of Materials Science and Engineering, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
| | - Yin Zhang
- Department of Medical Physics, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
| | - Stephen A. Graves
- Department of Medical Physics, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
| | - Savo Bou Zein Eddine
- Department of Radiology, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
- Faculty of Medicine and Medical Center, American University of Beirut, Beirut 11072020, Lebanon
| | - Yunan Yang
- Department of Radiology, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
| | | | - Robert J. Nickles
- Department of Medical Physics, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
| | - Xudong Wang
- Department of Materials Science and Engineering, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
| | - Weibo Cai
- Department of Radiology, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
- Department of Medical Physics, University of Wisconsin - Madison, Wisconsin 53705-2275, United States
- University of Wisconsin Carbone Cancer Center, Madison, Wisconsin 53705-2275, United States
| |
Collapse
|
21
|
Zhao B, Jiang MM, Zhao DX, Li Y, Wang F, Shen DZ. Electrically driven plasmon mediated energy transfer between ZnO microwires and Au nanoparticles. NANOSCALE 2015; 7:1081-1089. [PMID: 25476913 DOI: 10.1039/c4nr05369a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Electrically driven energy transfer between the surface defect states of ZnO quadrilateral microwires (MWs) and localized surface plasmon polaritons has been realized by means of introducing Au nanoparticles (NPs). An electroluminescence device with green emission using ZnO quadrilateral MWs, was fabricated. Once the Au NPs are sputtered on the surfaces of the ZnO MWs, the electroluminescence of the ZnO MWs will shift from green to red. Meanwhile, dual emissions were observed by means of sputtering Au NPs on a single ZnO MW periodically. Due to the Au NPs, electrically driven plasmon mediated energy transfer can achieve the modulation of amplifying, or quenching the surface defect emission. The relevant dynamic process of the surface plasmon mode mediated energy transfer was investigated. This new energy transfer method potentially offers an approach of modification and recombination of the surface defect state excitations of wide bandgap semiconductor materials.
Collapse
Affiliation(s)
- Bin Zhao
- State key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, No. 3888 Dongnanhu Road, Changchun, 130033, People's Republic of China
| | | | | | | | | | | |
Collapse
|
22
|
Taleb A, Mesguich F, Onfroy T, Yanpeng X. Design of TiO2/Au nanoparticle films with controlled crack formation and different architectures using a centrifugal strategy. RSC Adv 2015. [DOI: 10.1039/c4ra13829e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Centrifugal strategy is demonstrated to enable the design of hybrid nanocomposite films with controllable architecture, porosity, crack density and thickness.
Collapse
Affiliation(s)
- Abdelhafed Taleb
- Institut de Recherche de Chimie Paris
- CNRS – Chimie ParisTech
- 75005 Paris
- France
- Sorbonne Universités
| | - Frederic Mesguich
- Institut de Recherche de Chimie Paris
- CNRS – Chimie ParisTech
- 75005 Paris
- France
- Sorbonne Universités
| | - Thomas Onfroy
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 7197
- Laboratoire de Réactivité de Surface
- Paris
| | - Xue Yanpeng
- Institut de Recherche de Chimie Paris
- CNRS – Chimie ParisTech
- 75005 Paris
- France
- Sorbonne Universités
| |
Collapse
|
23
|
Kim NY, Hong SH, Kang JW, Myoung N, Yim SY, Jung S, Lee K, Tu CW, Park SJ. Localized surface plasmon-enhanced green quantum dot light-emitting diodes using gold nanoparticles. RSC Adv 2015. [DOI: 10.1039/c4ra15585h] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We demonstrate solution processed gold nanoparticles and a ZnO hybrid structure for localized surface plasmon-enhanced colloidal quantum-dot light-emitting diodes.
Collapse
Affiliation(s)
- Na-Yeong Kim
- Department of Nanobio Materials and Electronics
- Gwangju Institute of Science and Technology
- Gwangju 500-712
- Korea
| | - Sang-Hyun Hong
- Department of Nanobio Materials and Electronics
- Gwangju Institute of Science and Technology
- Gwangju 500-712
- Korea
| | - Jang-Won Kang
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology
- Gwangju 500-712
- Korea
| | - NoSoung Myoung
- Advanced Photonics Research Institute
- Gwangju Institute of Science and Technology
- Gwangju
- Korea
| | - Sang-Youp Yim
- Advanced Photonics Research Institute
- Gwangju Institute of Science and Technology
- Gwangju
- Korea
| | - Suhyun Jung
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology
- Gwangju 500-712
- Korea
| | - Kwanghee Lee
- Department of Nanobio Materials and Electronics
- Gwangju Institute of Science and Technology
- Gwangju 500-712
- Korea
- School of Materials Science and Engineering
| | - Charles W. Tu
- Department of Electrical and Computer Engineering
- University of California
- San Diego, La Jolla
- USA
| | - Seong-Ju Park
- Department of Nanobio Materials and Electronics
- Gwangju Institute of Science and Technology
- Gwangju 500-712
- Korea
- School of Materials Science and Engineering
| |
Collapse
|
24
|
Saravanan K, Krishnan R, Hsieh SH, Wang HT, Wang YF, Pong WF, Asokan K, Avasthi DK, Kanjilal D. Effect of defects and film thickness on the optical properties of ZnO–Au hybrid films. RSC Adv 2015. [DOI: 10.1039/c5ra02144h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Thickness and defects effects on the optical properties of ZnO–Au hybrid films were studied using optical and electronic structural studies.
Collapse
Affiliation(s)
- K. Saravanan
- Department of Physics
- Tamkang University
- Tamsui-251
- Taiwan
| | - R. Krishnan
- Materials Science Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam-603102
- India
| | - S. H. Hsieh
- Department of Physics
- Tamkang University
- Tamsui-251
- Taiwan
| | - H. T. Wang
- Department of Physics
- National Tsing Hua University
- Hsinchu-30013
- Taiwan
| | - Y. F. Wang
- Department of Physics
- Tamkang University
- Tamsui-251
- Taiwan
| | - W. F. Pong
- Department of Physics
- Tamkang University
- Tamsui-251
- Taiwan
| | - K. Asokan
- Materials Science Group
- Inter-University Accelerator Centre
- New Delhi-110067
- India
| | - D. K. Avasthi
- Materials Science Group
- Inter-University Accelerator Centre
- New Delhi-110067
- India
| | - D. Kanjilal
- Materials Science Group
- Inter-University Accelerator Centre
- New Delhi-110067
- India
| |
Collapse
|
25
|
Jiang T, Qin X, Sun Y, Yu M. UV photocatalytic activity of Au@ZnO core–shell nanostructure with enhanced UV emission. RSC Adv 2015. [DOI: 10.1039/c5ra11653h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Au@ZnO core–shell nanostructures with increased ultraviolet photoluminescence emissions present remarkably enhanced ultraviolet photocatalytic properties, based on bidirectional electron transfer between Au and ZnO.
Collapse
Affiliation(s)
- Tingting Jiang
- State Key Laboratory of Urban Water Resource and Environment
- School of Chemical Engineering and Technology
- Harbin Institute of Technology
- Harbin 150000
- China
| | - Xueying Qin
- Condensed Matter Science and Technology Institute
- School of Science
- Harbin Institute of Technology
- Harbin 150080
- China
| | - Ye Sun
- Condensed Matter Science and Technology Institute
- School of Science
- Harbin Institute of Technology
- Harbin 150080
- China
| | - Miao Yu
- State Key Laboratory of Urban Water Resource and Environment
- School of Chemical Engineering and Technology
- Harbin Institute of Technology
- Harbin 150000
- China
| |
Collapse
|
26
|
Nootchanat S, Ninsonti H, Baba A, Ekgasit S, Thammacharoen C, Shinbo K, Kato K, Kaneko F. Investigation of localized surface plasmon/grating-coupled surface plasmon enhanced photocurrent in TiO2thin films. Phys Chem Chem Phys 2014; 16:24484-92. [DOI: 10.1039/c4cp03885a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
27
|
Yan Y, Zeng Y, Wu Y, Zhao Y, Ji L, Jiang Y, Li L. Ten-fold enhancement of ZnO thin film ultraviolet-luminescence by dielectric microsphere arrays. OPTICS EXPRESS 2014; 22:23552-23564. [PMID: 25321823 DOI: 10.1364/oe.22.023552] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Here we report strong enhancement in ultraviolet-photoluminescence (UV-PL) of ZnO thin films (grown on a SiC substrate) covered by monolayer dielectric fused silica or polystyrene microspheres with diameters ranging from 0.5 to 7.5 μm. The excited light scatted in the film is collected by the microspheres to stimulate whispering gallery modes, by which the internal quantum efficiency of spontaneous emission is enhanced. Meanwhile, the microsphere monolayer efficiently couples emitted light energy from the luminescent film to the far-field for PL detection. A UV-PL enhancement up to 10-fold via a 5-µm-diameter microsphere monolayer is experimentally demonstrated in this work. The unique optical property of microsphere in photoluminescence (PL) enhancement makes them promising for high-sensitivity PL measurements as well as design of photoelectric devices with low loss and high efficiency.
Collapse
|
28
|
Wang Z, Guo X, Sham TK. 2D XANES-XEOL mapping: observation of enhanced band gap emission from ZnO nanowire arrays. NANOSCALE 2014; 6:6531-6. [PMID: 24845079 DOI: 10.1039/c4nr01049c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Using 2D XANES-XEOL spectroscopy, it is found that the band gap emission of ZnO nanowire arrays is substantially enhanced i.e. that the intensity ratio between the band gap and defect emissions increases by more than an order of magnitude when the excitation energy is scanned across the O K-edge. Possible mechanisms are discussed.
Collapse
Affiliation(s)
- Zhiqiang Wang
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada.
| | | | | |
Collapse
|
29
|
Yenchalwar SG, Azhagan VK, Shelke MV. Enhanced photoluminescence and photoactivity of plasmon sensitized nSiNWs/TiO2 heterostructures. Phys Chem Chem Phys 2014; 16:17786-91. [DOI: 10.1039/c4cp01497a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
nSiNWs/TiO2 exhibit improved optical properties due to the surface plasmons of AuNPs, where band gap emission increases at the expense of defect radiation and higher photocurrent as a result of the near field effect combined with subsequent plasmonic energy transfer.
Collapse
Affiliation(s)
- Sandeep G. Yenchalwar
- Physical and Materials Chemistry Division
- CSIR-National Chemical Laboratory
- Pune-411008, India
- Academy of Scientific and Innovative Research (AcSIR)
- AnusandhanBhawan
| | - Vedi Kuyil Azhagan
- Physical and Materials Chemistry Division
- CSIR-National Chemical Laboratory
- Pune-411008, India
| | - Manjusha V. Shelke
- Physical and Materials Chemistry Division
- CSIR-National Chemical Laboratory
- Pune-411008, India
- Academy of Scientific and Innovative Research (AcSIR)
- AnusandhanBhawan
| |
Collapse
|
30
|
Mahanti M, Basak D. Enhanced emission properties of Au/SiO2/ZnO nanorod layered structure: effect of SiO2 spacer layer and role of interfacial charge transfer. RSC Adv 2014. [DOI: 10.1039/c4ra00950a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
31
|
Lou Y, Yuan S, Zhao Y, Hu P, Wang Z, Zhang M, Shi L, Li D. Molecular-scale interface engineering of metal nanoparticles for plasmon-enhanced dye sensitized solar cells. Dalton Trans 2013; 42:5330-7. [DOI: 10.1039/c3dt32741h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
32
|
Zhang N, Tang W, Wang P, Zhang X, Zhao Z. In situ enhancement of NBE emission of Au–ZnO composite nanowires by SPR. CrystEngComm 2013. [DOI: 10.1039/c3ce40114f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
33
|
Kochuveedu ST, Jang YH, Kim DH. A study on the mechanism for the interaction of light with noble metal-metal oxide semiconductor nanostructures for various photophysical applications. Chem Soc Rev 2013; 42:8467-93. [DOI: 10.1039/c3cs60043b] [Citation(s) in RCA: 447] [Impact Index Per Article: 40.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
34
|
Shao D, Sun H, Yu M, Lian J, Sawyer S. Enhanced ultraviolet emission from poly(vinyl alcohol) ZnO nanoparticles using a SiO2-Au core/shell structure. NANO LETTERS 2012; 12:5840-5844. [PMID: 23094803 DOI: 10.1021/nl3031955] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Enhanced near band gap edge (NBE) emissions of PVA-ZnO nanoparticles were achieved by employing SiO(2)-Au core/shell nanostructures whereas the defect-level emission (DLE) is greatly suppressed. A maximum enhancement of nearly 400% was observed using SiO(2)-Au for the emission with optical resonance at 554 nm. SiO(2)-Au core/shell nanostructures also show a superior tunability of resonance energy as compared to that of the pure metal nanoparticles. The enhancement of the NBE emission and suppressed DLE is ascribed to the transfer of the energetic electrons excited by surface plasmon from metal nanoparticles to the conduction band of ZnO nanoparticles.
Collapse
Affiliation(s)
- Dali Shao
- Department of Electrical, Computer, and Systems Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
| | | | | | | | | |
Collapse
|
35
|
Dhara S, Giri P. Improved fast photoresponse from Al doped ZnO nanowires network decorated with Au nanoparticles. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.05.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
36
|
Surface-Plasmon-Enhanced Band Emission of ZnO Nanoflowers Decorated with Au Nanoparticles. Chemistry 2012; 18:7467-72. [DOI: 10.1002/chem.201200054] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2012] [Indexed: 11/07/2022]
|
37
|
Lawrie BJ, Mu R, Haglund RF. Selective Purcell enhancement of defect emission in ZnO thin films. OPTICS LETTERS 2012; 37:1538-1540. [PMID: 22555730 DOI: 10.1364/ol.37.001538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A zinc interstitial defect present but unobservable in ZnO thin films annealed at 500 °C in oxygen or in atmosphere was selectively detected by interaction of the film with an Ag surface-plasmon polariton. The time-dependent differential reflectivity of the ZnO near the ZnO/MgO interface exhibited a subpicosecond decay followed by a several nanosecond recovery, consistent with the Purcell-enhanced Zn interstitial luminescence seen in Ag-ZnO heterostructures. Heterostructures annealed at other temperatures showed significantly greater band-edge photoluminescence and no evidence of the Zn interstitial defect.
Collapse
Affiliation(s)
- B J Lawrie
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA.
| | | | | |
Collapse
|
38
|
Brewster MM, Zhou X, Lu MY, Gradečak S. The interplay of structural and optical properties in individual ZnO nanostructures. NANOSCALE 2012; 4:1455-1462. [PMID: 22318655 DOI: 10.1039/c2nr11706a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Semiconductor nanostructures exhibit unique properties distinct from their bulk counterparts by virtue of nanoscale dimensions; in particular, exceptionally large surface area-to-volume ratios relative to that of the bulk produce variations in surface state populations that have numerous consequences on materials properties. Of the low-dimensional semiconductor nanostructures, nanowires offer a unique prospect in nanoscale optoelectronics due to their one-dimensional architecture. Already, many devices based upon individual nanowires have been demonstrated, but questions about how nano-size and structural variations affect the underlying materials properties still remain unanswered. Here, we focus on understanding the growth mechanism and kinetics of ZnO nanowires and related nanowalls, and their effects on nanoscale structural and optical properties.
Collapse
Affiliation(s)
- Megan M Brewster
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | | | | | | |
Collapse
|
39
|
Bang S, Lee S, Park T, Ko Y, Shin S, Yim SY, Seo H, Jeon H. Dual optical functionality of local surface plasmon resonance for RuO2 nanoparticle–ZnO nanorod hybrids grown by atomic layer deposition. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31513k] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
40
|
Lin HY, Cheng CL, Lin YS, Hung Y, Mou CY, Chen YF. Integrated nanophotonic hubs based on ZnO-Tb(OH)3/SiO2 nanocomposites. NANOSCALE RESEARCH LETTERS 2011; 6:503. [PMID: 21859482 PMCID: PMC3212018 DOI: 10.1186/1556-276x-6-503] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Accepted: 08/22/2011] [Indexed: 05/31/2023]
Abstract
Optical integration is essential for practical application, but it remains unexplored for nanoscale devices. A newly designed nanocomposite based on ZnO semiconductor nanowires and Tb(OH)3/SiO2 core/shell nanospheres has been synthesized and studied. The unique sea urchin-type morphology, bright and sharply visible emission bands of lanthanide, and large aspect ratio of ZnO crystalline nanotips make this novel composite an excellent signal receiver, waveguide, and emitter. The multifunctional composite of ZnO nanotips and Tb(OH)3/SiO2 nanoparticles therefore can serve as an integrated nanophotonics hub. Moreover, the composite of ZnO nanotips deposited on a Tb(OH)3/SiO2 photonic crystal can act as a directional light fountain, in which the confined radiation from Tb ions inside the photonic crystal can be well guided and escape through the ZnO nanotips. Therefore, the output emission arising from Tb ions is truly directional, and its intensity can be greatly enhanced. With highly enhanced lasing emissions in ZnO-Tb(OH)3/SiO2 as well as SnO2-Tb(OH)3/SiO2 nanocomposites, we demonstrate that our approach is extremely beneficial for the creation of low threshold and high-power nanolaser.
Collapse
Affiliation(s)
- Hsia Yu Lin
- Department of Physics, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei 106, Taiwan, Republic of China
| | - Chung Liang Cheng
- Department of Physics, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei 106, Taiwan, Republic of China
| | - Yu Shen Lin
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei 106, Taiwan, Republic of China
| | - Yann Hung
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei 106, Taiwan, Republic of China
| | - Chung Yuan Mou
- Department of Chemistry, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei 106, Taiwan, Republic of China
| | - Yang Fang Chen
- Department of Physics, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd, Taipei 106, Taiwan, Republic of China
| |
Collapse
|
41
|
Li GP, Chen R, Guo DL, Wong LM, Wang SJ, Sun HD, Wu T. Nanoscale semiconductor-insulator-metal core/shell heterostructures: facile synthesis and light emission. NANOSCALE 2011; 3:3170-3177. [PMID: 21698326 DOI: 10.1039/c1nr10352k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Controllably constructing hierarchical nanostructures with distinct components and designed architectures is an important theme of research in nanoscience, entailing novel but reliable approaches of bottom-up synthesis. Here, we report a facile method to reproducibly create semiconductor-insulator-metal core/shell nanostructures, which involves first coating uniform MgO shells onto metal oxide nanostructures in solution and then decorating them with Au nanoparticles. The semiconductor nanowire core can be almost any material and, herein, ZnO, SnO(2) and In(2)O(3) are used as examples. We also show that linear chains of short ZnO nanorods embedded in MgO nanotubes and porous MgO nanotubes can be obtained by taking advantage of the reduced thermal stability of the ZnO core. Furthermore, after MgO shell-coating and the appropriate annealing treatment, the intensity of the ZnO near-band-edge UV emission becomes much stronger, showing a 25-fold enhancement. The intensity ratio of the UV/visible emission can be increased further by decorating the surface of the ZnO/MgO nanowires with high-density plasmonic Au nanoparticles. These heterostructured semiconductor-insulator-metal nanowires with tailored morphologies and enhanced functionalities have great potential for use as nanoscale building blocks in photonic and electronic applications.
Collapse
Affiliation(s)
- Gong Ping Li
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | | | | | | | | | | | | |
Collapse
|
42
|
Wei CM, Chen CW, Wang CH, Chen JY, Chen YC, Chen YF. Magnetically tunable surface plasmon resonance based on a composite consisting of noble metal nanoparticles and a ferromagnetic thin film. OPTICS LETTERS 2011; 36:514-516. [PMID: 21326440 DOI: 10.1364/ol.36.000514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We demonstrate magnetically tunable surface plasmon resonance based on a composite consisting of noble metal nanoparticles and ferromagnetic thin film. We found that both the frequency and linewidth of the localized surface plasmon resonance can be manipulated by applying an external magnetic field. The underlying mechanism is attributed to the variation of the dielectric constant in the ferromagnetic thin film resulting from the change of magnetization. Our result shown here paves an alternative route for manipulation of the characteristics of the surface plasmon resonance, which may serve as a new design concept for the development of magneto-optical devices.
Collapse
Affiliation(s)
- Chih-Ming Wei
- Department of Physics, National Taiwan University, Taipei, Taiwan
| | | | | | | | | | | |
Collapse
|
43
|
Jang YH, Yang SY, Jang YJ, Park C, Kim JK, Kim DH. Ultrahigh Density Arrays of Toroidal ZnO Nanostructures by One-Step Cooperative Self-Assembly Processes: Mechanism of Structural Evolution and Hybridization with Au Nanoparticles. Chemistry 2011; 17:2068-76. [DOI: 10.1002/chem.201002912] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2010] [Indexed: 11/06/2022]
|
44
|
Nakamura T, Hosaka T, Adachi S. Gold-nanoparticle-assisted random lasing from powdered GaN. OPTICS EXPRESS 2011; 19:467-475. [PMID: 21263586 DOI: 10.1364/oe.19.000467] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We demonstrate Au-nanoparticle-assisted random lasing from a powdered GaN sample. In the presence of Au nanoparticles on GaN powder surfaces, several lasing lines are observed in photoexcited luminescence spectra near the center of the GaN band-edge emission peak. The random lasing is considered to arise from a decrease in the lasing threshold due to the suppression of crystal defect loss by surface plasmon excitation on Au. From spatially resolved lasing emission spectra and their FT analysis results, the formation of random lasing cavities at different spatial positions is confirmed. The size of the random lasing spot is determined to be larger than that of the scattered light speckle of the pumping source on a thin powdered GaN sample.
Collapse
|
45
|
Qiu D, Wan Z, Cai X, Yuan Z, Hu L, Zhang B, Cai C, Wu H. Enhancement of light emission from nanostructured In(2)O(3) via surface plasmons. OPTICS EXPRESS 2010; 18:23385-23393. [PMID: 21164680 DOI: 10.1364/oe.18.023385] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report the construction of In(2)O(3)/Ag/In(2)O(3) sandwich nanostructures and realization of effective coupling with surface plasmon (SP) modes. An enhancement of photoluminescence as large as 278-fold is achieved for the new nanostructures, while only eightfold is obtained from bilayer structures. The advancement of the nanostructures is that both the frequency of incidence photons and the in-plane wavevector of the excited SP modes along each side of the sandwiched nanometer metal layer are identical, thus the momenta mismatch between two SP modes which inevitably occurs in commonly used metal/dielectric bilayer structures is no longer a problem. The fulfillment of the cross coupling and resonance conditions of the two SP modes leads to the tremendous amplification of light emission. Such sandwich nanostructures can be readily extended to other dielectric/metal/dielectric nanomaterial combinations and identified as technologically useful for SP mediated light emitting devices.
Collapse
Affiliation(s)
- Dongjiang Qiu
- Department of Physics, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
| | | | | | | | | | | | | | | |
Collapse
|
46
|
|
47
|
Sahu G, Lenka HP, Mahapatra DP, Rout B, McDaniel FD. Narrow band UV emission from direct bandgap Si nanoclusters embedded in bulk Si. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:072203. [PMID: 21386375 DOI: 10.1088/0953-8984/22/7/072203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report on the formation of UV emitting Si nanoclusters (NCs) in Si, using a two stage Au implantation technique. These Si NCs, with an average size of 2 nm, show photoluminescence at room temperature, over a narrow band of about 100 meV with a peak of emission near 3.3 eV. With emission lifetimes in the range of 1.5-2.5 ns, the transitions seem to come from excitonic recombinations across a quasi-direct gap. Since the structures are below the surface, there is no adverse effect of oxidation resulting in a shift in emission wavelength. On the other hand, an annealing at 500 °C has been found to result in a significant increase in the emission intensity. This is due to localized plasmon induced electric field enhancement in Au nano-islands in the vicinity.
Collapse
Affiliation(s)
- G Sahu
- Institute of Physics, Sachivalaya Marg, Bhubaneswar-751005, India
| | | | | | | | | |
Collapse
|
48
|
Chen YL, Chen CL, Lin HY, Chen CW, Chen YF, Hung Y, Mou CY. Enhancement of random lasing based on the composite consisting of nanospheres embedded in nanorods template. OPTICS EXPRESS 2009; 17:12706-12713. [PMID: 19654676 DOI: 10.1364/oe.17.012706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A simple and general approach has been developed for the enhancement of random lasing based on the composite consisting of nanospheres and nanorods array. Due to the inherent nature of high refractive index, the selected nanorods act efficiently as scattering feedback centers, which can promote the formation of closed loop paths of the emission arising from nanospheres. To illustrate our working principle, the composite consisting of Tb(OH)(3)/SiO(2) nanospheres and ZnO nanorods was chosen as an example. Quite interestingly, it is found that the random lasing behavior can be easily achieved for the composite system, while it is absent in pure Tb(OH)(3)/SiO(2) nanospheres. The strategy demonstrated here should be very useful for the future development of coherent light emission sources and many other optoelectronic devices.
Collapse
Affiliation(s)
- Y L Chen
- Department of Physics, National Taiwan University, Taipei 106, Taiwan.
| | | | | | | | | | | | | |
Collapse
|
49
|
Chen P, Ma X, Zhang Y, Li D, Yang D. Electrophotoluminescence of sol-gel derived ZnO film: effect of electric field on near-band-edge photoluminescence. OPTICS EXPRESS 2009; 17:11434-11439. [PMID: 19582058 DOI: 10.1364/oe.17.011434] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The effect of electric field on near-band-edge (NBE) photoluminescence (PL) of a sol-gel derived ZnO film has been investigated via a SiO(2)/ZnO/SiOx(x < 2) double-barrier structure on Si under different forward biases. A forward current-voltage curve is characterized by a negative-differential-resistance (NDR) region, which follows a normal region. With an increase of forward bias the NBE PL of the ZnO film is enhanced in the normal region, but it is attenuated in the NDR region. The increase of forward bias also causes the NBE PL of the ZnO film to blueshift from approximately 377.6 to approximately 374.9 nm no matter how current changes. The mechanism for the effect of bias on the intensity and position of NBE PL of the ZnO film is discussed.
Collapse
Affiliation(s)
- Peiliang Chen
- Department of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
| | | | | | | | | |
Collapse
|
50
|
Zhang Y, Li X, Ren X. Effects of localized surface plasmons on the photoluminescence properties of Au-coated ZnO films. OPTICS EXPRESS 2009; 17:8735-8740. [PMID: 19466122 DOI: 10.1364/oe.17.008735] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The ultraviolet (UV) emission from the Au-coated ZnO films was greatly enhanced and the visible emission was significantly suppressed compared with the un-coated ZnO films. Great changes in photoluminescence of ZnO films are attributed to the electron transfer between conduction band and defect levels through the localized surface plasmons. The increase of electron density in conduction band causes enhanced UV emission, while the decrease in electron density in defect level leads to the suppression of the visible emission. Such ZnO films with enhanced UV emission have potential applications in the highly efficient solid state emitters.
Collapse
Affiliation(s)
- Yang Zhang
- Institute for Physics of Microsystems and Department of Physics, Henan University, Kaifeng, Henan 475004, China
| | | | | |
Collapse
|