Dye fluorescence enhancement and quenching by gold nanoparticles: Direct near-field microscopic observation of shape dependence

被引：47

作者：

Horimoto, Noriko Nishizawa ^{[1
]}

Imura, Kohei ^{[1
,2
]}

Okamoto, Hiromi ^{[1
,2
]}

机构：

[1] Natl Inst Nat Sci, Inst Mol Sci, Okazaki, Aichi 4448585, Japan

[2] Grad Univ Adv Studies, Okazaki, Aichi 4448585, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2008年 / 467卷 / 1-3期

基金：

日本学术振兴会;

关键词：

D O I：

10.1016/j.cplett.2008.10.067

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We investigated the enhancement and quenching of dye fluorescence by single gold nanoparticles using an aperture-type scanning near-field optical microscope to evaluate the shape dependence. Enhancement or reduction of fluorescence was found to be strongly dependent on the shape of the particle. Gold nano-plates showed significant fluorescence enhancement, as did aggregated nanoparticles for the most part. On the other hand, gold nanorods with high aspect ratios showed quenching effects. The results suggest that the electromagnetic near-field in the vicinity of the surface of nanoparticles, not just near the apex or the tip but the whole surface, is important for understanding fluorescence enhancement and quenching. (C) 2008 Elsevier B. V. All rights reserved.

引用

页码：105 / 109

页数：5

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