Merck
  • 主页
  • 查找结果
  • Surface plasmon-enhanced light-emission mechanism of Ag-coated ZnO/Al2O3 core/shell nanorod structures.

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
摘要

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.

材料
货号
品牌
产品描述

Sigma-Aldrich
氧化铝, activated, basic, Brockmann I
Sigma-Aldrich
氧化铝, activated, neutral, Brockmann I
Sigma-Aldrich
氧化锌, nanopowder, <100 nm particle size
Sigma-Aldrich
氧化铝, nanopowder, <50 nm particle size (TEM)
Supelco
氧化铝, activated, neutral, Brockmann Activity I
Sigma-Aldrich
氧化锌, nanopowder, <50 nm particle size (BET), >97%
Sigma-Aldrich
氧化锌, ReagentPlus®, powder, <5 μm particle size, 99.9%
Sigma-Aldrich
氧化铝, powder, 99.99% trace metals basis
Sigma-Aldrich
氧化锌,分散体, nanoparticles, <100 nm particle size (TEM), ≤40 nm avg. part. size (APS), 20 wt. % in H2O
Sigma-Aldrich
氧化锌, puriss. p.a., ACS reagent, ≥99.0% (KT)
Sigma-Aldrich
氧化锌, 99.99% trace metals basis
Sigma-Aldrich
氧化铝, activated, acidic, Brockmann I
Sigma-Aldrich
氧化铝, nanopowder, 13 nm primary particle size (TEM), 99.8% trace metals basis
Sigma-Aldrich
金, foil, thickness 0.127 mm, 99.99% trace metals basis
Sigma-Aldrich
氧化铝, powder, primarily α phase, ≤10 μm avg. part. size, 99.5% trace metals basis
Sigma-Aldrich
氧化铝, pellets, 3 mm
Sigma-Aldrich
氧化铝, 99.997% trace metals basis
Sigma-Aldrich
氧化铝, nanoparticles, <50 nm particle size (DLS), 20 wt. % in isopropanol
Sigma-Aldrich
金, nanopowder, <100 nm particle size, 99.9% trace metals basis
Sigma-Aldrich
金, wire, diam. 0.25 mm, ≥99.9% trace metals basis
Sigma-Aldrich
氧化铝, nanoparticles, 30-60 nm particle size (TEM), 20 wt. % in H2O
Sigma-Aldrich
镀金显微镜载片, layer thickness 100 Å, 99.999% (Au)
Sigma-Aldrich
金, foil, thickness 0.5 mm, 99.99% trace metals basis
Sigma-Aldrich
氧化铝, Corundum, α-phase, -100 mesh
Sigma-Aldrich
氧化锌,分散体, nanoparticles, 40 wt. % in ethanol, <130 nm particle size
Sigma-Aldrich
金, powder, <45 μm, 99.99% trace metals basis
Sigma-Aldrich
金, beads, 1-6 mm, 99.999% trace metals basis
Sigma-Aldrich
氧化铝, pore size 58 Å, ~150 mesh
Sigma-Aldrich
介孔氧化铝, MSU-X (wormhole), average pore size 3.8 nm
Sigma-Aldrich
氧化铝, nanowires, diam. × L 2-6 nm × 200-400 nm