金属-半导体杂化纳米结构中的表面等离子体增强能量转移。

Surface plasmon enhanced energy transfer in metal-semiconductor hybrid nanostructures.

机构信息

State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou, 510275, China.

出版信息

Nanoscale. 2011 Aug;3(8):3056-9. doi: 10.1039/c1nr10367a. Epub 2011 Jun 24.

DOI:10.1039/c1nr10367a

PMID:21701747

Abstract

We report a type of hybrid nanostructures composed of ZnO nanoparticles, CdSe/ZnS core/shell quantum dots (QDs), and Ag nanoprisms. With ultraviolet light illumination, the energy absorbed by ZnO nanoparticles was transferred to the CdSe/ZnS core/shell QDs inducing a photoluminescence (PL) emission. To enhance the PL emission, Ag nanoprisms were doped in the ZnO nanoparticles and the QDs. Enhanced energy transfer from the ZnO nanoparticles to the QDs via the surface plasmon effect of the Ag nanoprisms was also demonstrated. The PL emission dependence was investigated as a function of the doped Ag nanoprism concentration and a 7.4 times PL enhancement was obtained at an Ag nanoprism concentration of 5 × 10(-8) M.

摘要

我们报告了一种由 ZnO 纳米粒子、CdSe/ZnS 核/壳量子点（QDs）和 Ag 纳米棱镜组成的混合纳米结构。在紫外光照射下，ZnO 纳米粒子吸收的能量被转移到 CdSe/ZnS 核/壳 QDs 上，诱导出光致发光（PL）发射。为了增强 PL 发射，在 ZnO 纳米粒子和 QDs 中掺杂了 Ag 纳米棱镜。通过 Ag 纳米棱镜的表面等离激元效应，从 ZnO 纳米粒子到 QDs 的能量转移也得到了增强。研究了 PL 发射随掺杂 Ag 纳米棱镜浓度的变化关系，在 Ag 纳米棱镜浓度为 5×10^(-8) M 时，获得了 7.4 倍的 PL 增强。