Surface-enhanced Raman scattering of 4-mercaptopyridine on sub-monolayers of α-Fe2O3 nanocrystals (sphere, spindle, cube)

被引：67
作者：
Fu, Xiaoqi [1 ]
Bei, Fengli [1 ]
Wang, Xin [1 ]
Yang, Xujie [1 ]
Lu, Lude [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Minist Educ, Key Lab Soft Chem & Funct Mat, Nanjing 210094, Peoples R China
来源：
JOURNAL OF RAMAN SPECTROSCOPY | 2009年 / 40卷 / 09期
基金：
中国国家自然科学基金;
关键词：
SERS; 4-mercaptopyridine; sub-monolayers; alpha-Fe2O3; nanocrystals; enhancement factor; TRANSITION-METALS; QUANTUM DOTS; SPECTROSCOPY; MOLECULES; SERS; ELECTRODES; PYRIDINE; SILVER; NANOPARTICLES; COPPER;
D O I：
10.1002/jrs.2281
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
We report surface-enhanced Raman scattering (SERS) spectra from 4-mercaptopyridine (4-Mpy) adsorbed on sub-monolayers of alpha-Fe2O3 nanocrystals (sphere, spindle, cube). The maximum enhancement factor has been estimated to be about 10(4) compared to that of 4-Mpy in solution. A possible mechanism has been proposed that the charge transfer between the alpha-Fe2O3 nanocrystals and the 4-Mpy molecules is most likely responsible for the observed enhancement of Raman intensity of adsorbed 4-Mpy molecules as surface plasmon resonances have not occurred. Copyright (C) 2009 John Wiley & Sons, Ltd.
引用
收藏
页码：1290 / 1295
页数：6
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