Experimental and theoretical evidence for the chemical mechanism in SERRS of rhodamine 6G adsorbed on colloidal silver excited at 1064 nm

被引：30

作者：

Dong, Bin ^{[1
,2
]}

Liu, Liwei ^{[3
]}

Xu, Hongxing ^{[1
,4
]}

Sun, Mengtao ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Dalian Nationalities Univ, Sch Sci, Dalian 116600, Peoples R China

[3] Chinese Acad Sci, Suzhou Inst NanoTech & NanoBion, Suzhou 215125, Peoples R China

[4] Lund Univ, Div Solid State Phys, S-22100 Lund, Sweden

来源：

JOURNAL OF RAMAN SPECTROSCOPY | 2010年 / 41卷 / 07期

基金：

中国国家自然科学基金;

关键词：

SERS; chemical mechanism; 1064; nm; charge transfer excited state; SURFACE-ENHANCED RAMAN; SCATTERING;

D O I：

10.1002/jrs.2605

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The evidence for the existence of a chemical mechanism in surface-enhanced resonance Raman scattering (SERRS) of rhodamine 6G (R6G) adsorbed on colloidal silver excited at 1064 nm is reported on the basis of experimental and theoretical analyses. A weak absorption peak at around 1060 nm for R6G-functionalized silver nanoparticles was observed, which is not present in the individual spectra of R6G or silver nanoparticles. Theoretically, the charge difference density reveals that this weak absorption is a metal-to-molecule charge transfer excited state. Copyright (C) 2010 John Wiley & Sons, Ltd.

引用

页码：719 / 720

页数：2

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