Sarkar, Uttam K. ; Chakrabarti, Subhasis ; Pal, A. J. ; Misra, T. N. (1992) Surface enhanced Raman spectroscopic study of α-bithiophene and α-quaterthiophene molecules adsorbed on silver sols Spectrochimica Acta Part A: Molecular Spectroscopy, 48 (11-12). pp. 1625-1630. ISSN 0584-8539
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Official URL: http://www.sciencedirect.com/science/article/pii/0...
Related URL: http://dx.doi.org/10.1016/0584-8539(92)80236-P
Abstract
Surface enhanced Raman scattering (SERS) has been observed from α-bithiophene (2T) and α-quaterthiophene (4T) adsorbed on Ag sols. Experimental results suggest that the adsorbed oligothiophene molecules are anti but twisted and the twist angle is smaller in the surface adsorbed state than in solution. It has been observed that the enhancement factor decreases with the increase of the chain length and maximum enhancement is obtained at a higher concentration for the longer oligomer. The Raman excitation frequency dependence of the enhancement suggests a significant classical electromagnetic contribution to the SERS of oligothiophenes in Ag sols.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 65725 |
| Deposited On: | 18 Oct 2011 08:52 |
| Last Modified: | 18 Oct 2011 08:52 |
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