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
Author(s)
박일규노범영백성호[백성호]정용일김재현[김재현]
Keywords
ZNO NANORODS; FILMS
Issue Date
201305
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.13, no.5, pp.3335 - 3340
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 Al2O3. For the Ag NPs-coated ZnO NRs without Al2O3 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 Forster-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.
URI
http://hdl.handle.net/YU.REPOSITORY/25941http://dx.doi.org/10.1166/jnn.2013.7299
ISSN
1533-4880
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공과대학 > 전자공학과 > Articles
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