机械抛光金属衬底表面对Rh6G的荧光增强效应-陕西师范大学学报期刊社网站

陕西师范大学学报（自然科学版）

物理学

机械抛光金属衬底表面对Rh6G的荧光增强效应

蔡晓燕,徐良敏,张正龙,伏振兴,张明,郑海荣

(陕西师范大学物理学与信息技术学院, 陕西西安 710062)

蔡晓燕,女,硕士研究生,研究方向为表面增强荧光．

摘要:

应用激光光谱法,对吸附在机械抛光金属表面的Rh6G分子的荧光增强和淬灭现象进行研究．结果表明,金属银和铜表面均对Rh6G荧光辐射具有增强作用,且银表面增强效果优于铜表面．Rh6G荧光分子与金属衬底表面距离增大到一定程度时,银表面仍会增强Rh6G的荧光辐射,而铜表面则表现出荧光淬灭效应．

关键词：

Rh6G；金属衬底；表面等离子体

收稿日期：

2008-10-08

中图分类号：

O433.5+4

文献标识码：

文章编号：

1672-4291(2009)02-0025-04

基金项目：

教育部科学技术研究重点资助项目（108118）

Doi:

Fluorescence enhancement of Rh6G on mechanically polished metallic substrates

CAI Xiao-yan, XU Liang-min, ZHANG Zheng-long, FU Zhen-xing, ZHANG Ming, ZHENG Hai-rong*

(College of Physics and Information Technology, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)

Abstract:

The fluorescence enhancement and quenching of Rh6G absorbed on the mechanically polished Ag and Cu surfaces are investigated by using laser spectroscopic method. The result shows that both Ag and Cu surfaces present the fluorescence enhancement when Rh6G molecule absorbed on the surface. The factor of the fluorescence enhancement on Ag substrate is greater than that on the Cu substrate. Increasing the distance of the Rh6G molecules to the surface of the substrate, the Ag surface keep showing the enhancement effect to the fluorescence emission while the Cu substrate present fluorescence quenching effect.

KeyWords:

Rh6G; metallic substrate; surface plasma