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Surface Plasmon-Enhanced Light-Emission Mechanism of Ag-Coated ZnO/Al2O3 Core/Shell Nanorod Structures

Title
Surface Plasmon-Enhanced Light-Emission Mechanism of Ag-Coated ZnO/Al2O3 Core/Shell Nanorod Structures
Authors
Noh, BY[Noh, Bum-Young]Baek, SH[Baek, Seong-Ho]Jung, YI[Jung, Yong-Il]Kim, JH[Kim, Jae Hyun]Park, IK[Park, Il-Kyu]
DGIST Authors
Noh, BY[Noh, Bum-Young]; Baek, SH[Baek, Seong-Ho]; Jung, YI[Jung, Yong-Il]; Kim, JH[Kim, Jae Hyun]
Issue Date
2013-05
Citation
Journal of Nanoscience and Nanotechnology, 13(5), 3335-3340
Type
Article
Article Type
Article; Proceedings Paper
Keywords
Ag NanoparticleAluminumAluminum CoatingsAluminum OxideChemistryConformationCore-Shell NanorodsDirect TransferElectrical CarriersEnergy TransferForster Energy TransferGoldLight Emission MechanismsLuminescenceLuminescent MeasurementsMacromolecular SubstancesMacromoleculeMaterials TestingMetal NanoparticleMetal NanoparticlesMethodologyMolecular ConformationNanoparticlesNanorodsParticle SizePlasmonsSilverStructural CharacterizationSurface PlasmonSurface Plasmon ResonanceSurface PlasmonsSurface PropertiesSurface PropertyUltrastructureZinc OxideZnO NanorodZnO Nanorods
ISSN
1533-4880
Abstract
Surface plasmon (SP)-enhanced light emission mechanism has been investigated for the Ag-coated ZnO/Al2O3 core/shell nanorods (NRs). Structural characterizations showed that the ZnO NRs were covered by conformal Al2O3 layer and coated by Ag nanoparticles (NPs). The optical studies by photoluminescence (PL) showed abnormal variation of PL intensity with increasing the thickness of Al 2O3. For the Ag NPs-coated ZnO NRs without Al 2O3 shell layer, the PL emission quenched due to direct transfer of the photo-excited electrical carriers from ZnO NRs to Ag NPs. With thin Al2O3 layers less than 15 nm, the PL intensity increased with increasing the thickness of Al2O3 layers due to weakening of the Förster-type energy transfer while strong SP-mediated PL emission enhancement. For thicker Al2O3 layers than 15 nm, however, the PL intensity decreased with increasing the thickness of Al2O3 layers due to weakening of SP-mediated PL emission enhancement. Copyright © 2013 American Scientific Publishers.
URI
http://hdl.handle.net/20.500.11750/2434
DOI
10.1166/jnn.2013.7299
Publisher
American Scientific Publishers
Related Researcher
Files:
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Collection:
Division of Nano∙Energy Convergence Research1. Journal Articles


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