Merck

Surface plasmon-enhanced light-emission mechanism of Ag-coated ZnO/Al2O3 core/shell nanorod structures.

Journal of nanoscience and nanotechnology (2013-07-19)
Bum-Young Noh, Seong-Ho Baek, Yong-Il Jung, Jae Hyun Kim, Il-Kyu Park
PMID23858854
RESUMO

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 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.

MATERIAIS
Número do produto
Marca
Descrição do produto
373168
Sigma-Aldrich
Gold, evaporation slug, diam. × L 0.6 cm × 1.2 cm, 99.99% trace metals basis
349240
Sigma-Aldrich
Gold, foil, thickness 0.25 mm, ≥99.9% trace metals basis
310980
Sigma-Aldrich
Gold, wire, diam. 0.5 mm, 99.99% trace metals basis
265837
Sigma-Aldrich
Gold, rod, diam. 3.0 mm, 99.99% trace metals basis
349283
Sigma-Aldrich
Gold, wire, diam. 0.1 mm, 99.99% trace metals basis
349275
Sigma-Aldrich
Gold, foil, thickness 0.05 mm, 99.99% trace metals basis
349291
Sigma-Aldrich
Gold, wire, diam. 1.5 mm, 99.999% trace metals basis
326526
Sigma-Aldrich
Gold, wire, diam. 0.127 mm, 99.99% trace metals basis
349305
Sigma-Aldrich
Gold, wire, diam. 1.0 mm, 99.997% trace metals basis
326542
Sigma-Aldrich
Gold, beads, 1-6 mm, 99.999% trace metals basis
326585
Sigma-Aldrich
Gold, powder, <10 μm, ≥99.9% trace metals basis
265802
Sigma-Aldrich
Gold, wire, diam. 2.0 mm, 99.99% trace metals basis
265772
Sigma-Aldrich
Gold, powder, <45 μm, 99.99% trace metals basis
265829
Sigma-Aldrich
Gold, foil, thickness 0.5 mm, 99.99% trace metals basis
517747
Sigma-Aldrich
Aluminum oxide, mesoporous, MSU-X (wormhole), average pore size 3.8 nm
326534
Sigma-Aldrich
Gold, wire, diam. 0.25 mm, ≥99.9% trace metals basis
643246
Sigma-Aldrich
Gold coated microscope slide, layer thickness 1000 Å, 99.999% (Au)
643203
Sigma-Aldrich
Gold coated microscope slide, layer thickness 100 Å, 99.999% (Au)
06300
Supelco
Aluminum oxide, activated, neutral, Brockmann Activity I
718475
Sigma-Aldrich
Aluminum oxide, nanopowder, 13 nm primary particle size (TEM), 99.8% trace metals basis
702129
Sigma-Aldrich
Aluminum oxide, nanoparticles, <50 nm particle size (DLS), 20 wt. % in isopropanol
204951
Sigma-Aldrich
Zinc oxide, 99.999% trace metals basis
202606
Sigma-Aldrich
Aluminum oxide, 99.997% trace metals basis
265780
Sigma-Aldrich
Gold, wire, diam. 0.25 mm, 99.99% trace metals basis
265810
Sigma-Aldrich
Gold, foil, thickness 0.1 mm, 99.99% trace metals basis
265799
Sigma-Aldrich
Gold, wire, diam. 1.0 mm, 99.99% trace metals basis
551643
Sigma-Aldrich
Aluminum oxide, nanowires, diam. × L 2-6 nm × 200-400 nm
05184
Supelco
Aluminum oxide, for the determination of hydrocarbons
326496
Sigma-Aldrich
Gold, foil, thickness 0.127 mm, 99.99% trace metals basis
721077
Sigma-Aldrich
Zinc oxide, dispersion, nanoparticles, <100 nm particle size (TEM), ≤40 nm avg. part. size (APS), 20 wt. % in H2O