使用朗缪尔-布洛杰特膜观察到的表面等离子体耦合发射的距离依赖性。
Distance dependence of surface plasmon-coupled emission observed using Langmuir-Blodgett films.
作者信息
Ray Krishanu, Szmacinski Henryk, Enderlein Joerg, Lakowicz Joseph R
机构信息
Center for Fluorescence Spectroscopy, University Maryland School of Medicine, 725 W. Lombard St., Baltimore, Maryland 21201.
出版信息
Appl Phys Lett. 2007 Jun 22;90(25):251116. doi: 10.1063/1.2751125.
Abstract
Surface plasmon-coupled emission (SPCE) is a phenomenon in which fluorophores in the excited state couple with metallic structures resulting in surface plasmons that radiate into the substrate. The authors examined the dependence of SPCE on the distance and orientation of a fluorophore in the nanometric range of the Ag surface. The distance of the fluorophore from the Ag surface was controlled from 2 to 52 nm using Langmuir-Blodgett films. For a horizontally oriented cyanine dye, the experimental intensity and lifetime measurements are in excellent agreement with the detailed theoretical analysis of SPCE.
摘要
表面等离子体耦合发射（SPCE）是一种现象，即处于激发态的荧光团与金属结构耦合，产生辐射到基底中的表面等离子体。作者研究了在银表面纳米尺度范围内SPCE对荧光团距离和取向的依赖性。使用朗缪尔-布洛杰特膜将荧光团与银表面的距离控制在2至52纳米之间。对于水平取向的花青染料，实验强度和寿命测量结果与SPCE的详细理论分析非常吻合。
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