A COMPARATIVE-STUDY OF SERS FROM ALPHA-SEXITHIOPHENE AND OTHER THIOPHENE OLIGOMERS

被引：23
|
作者：
SARKAR, UK
CHAKRABARTI, S
MISRA, TN
PAL, AJ
机构：
[1] INDIAN ASSOC CULTIVAT SCI,DEPT SPECT,CALCUTTA 700032,W BENGAL,INDIA
[2] INDIAN ASSOC CULTIVAT SCI,DEPT SOLID STATE PHYS,CALCUTTA 700032,W BENGAL,INDIA
来源：
CHEMICAL PHYSICS LETTERS | 1992年 / 200卷 / 1-2期
关键词：
D O I：
10.1016/0009-2614(92)87044-P
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：
Surface enhanced Raman scattering (SERS) is observed from alpha-sexithiophene (6T) adsorbed on Ag sols and compared with other oligothiophenes. Concentration dependence and Raman excitation frequency dependence of the enhancement factor have been studied and explained in terms of "classical" and "chemical" contributions. Experimental results suggest that smaller oligomers form a monomolecular layer on the silver surface at a lower concentration than the longer oligomers. Also, the decrease in twist angle between the thiophene rings in the surface adsorbed state is larger for the smaller oligomers. Possible orientations of different oligothiophenes, on the silver surface, have been discussed.
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页码：55 / 59
页数：5
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