Hostname: page-component-848d4c4894-r5zm4 Total loading time: 0 Render date: 2024-07-06T09:58:14.952Z Has data issue: false hasContentIssue false

Surface-Enhanced Raman Spectroscopy from Colloids at High Pressures

Published online by Cambridge University Press:  15 February 2011

Michael Bradley
Affiliation:
Department of Chemistry, University of Connecticut, Storrs, CT 06269-3060
John Krech
Affiliation:
Department of Chemistry, University of Connecticut, Storrs, CT 06269-3060
Shlomo Efrima
Affiliation:
Department of Chemistry, Ben Gurion University of the Negev, Be'er Sheva, Israel.
Get access

Abstract

High pressure surface enhanced Raman (SERS) spectra are reported for a highly dense silver colloidal suspension, termed a MEtal Liquid-Like Film or MELLF. Comparison is made with the SERS spectrum of a dilute organosol. Raman signals due to adsorbed molecules and the solvent dichloromethane reveal appreciable frequency shifts as the colloidal environment is influenced by temperature, pressure, and packing. The C-Cl stretch of neat dichloromethane near 705 cm−1 shifts 1.7 cm −1 blue in a MELLF. Raman signals due to the adsorbed anisic acid in MELLFs blue shift about 2 cm −1 as 4 kilobars of pressure are applied; the solvent peaks shift blue only about 1 cm −1. Temperature influences the MELLF in two ways: desorption of anisic acid and formation of agglomerated particles.

Type
Research Article
Copyright
Copyright © Materials Research Society 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Yogev, D. and Efrima, S., J. Phys. Chem. 92, 5754, (1988).Google Scholar
2. Gordon, K.C., McGarvey, J.J., Taylor, K.P., J. Phys. Chem. 93, 6814 (1989).Google Scholar
3. Bell, S.E.J., McGarvey, J.J., Rigby, S.J., Walmsley, D.G., J. Raman Spectrosc. 22, 763 (1991).Google Scholar
4. Jeanmaire, D., Duyne, R.P. Van, J. Electroanal. Chem. 84, 1, (1977).Google Scholar
5. Chang, a. R.K., Furtak, T.E., Eds. Sutface-Enhanced Raman Scattering, (Plenum Press, New York, 1982). b. S. Efrima in Modern Aspects of Electrochemistry, edited by B.E. Conway, R. White and J. O'M. Bockris (Plenum Press, New York, 1985) Vol.16, p. 253.Google Scholar
6. Moskovits, M., Rev. Mod. Phys. 57, 783 (1985).Google Scholar
7. Zeiri, L. and Efrima, S., J. Phys. Chem. 96, 5908 (1992).Google Scholar
8. Yogev, D. and Efrima, S., Langmuir 7, 267 (1991).Google Scholar
9. Drickamer, H.G. in High Pressure Chemistry and Biochemistry, edited by Eldik, R. van and Jonas, J. (D. Reidel Publishing, Dordrecht, 1987) pp. 18; E.U. Franck, in High Pressure Chemistry and Biochemistry, edited by R. van Eldik and J. Jonas (D. Reidel Publishing, Dordrecht, 1987) pp. 93–116; J. Jonas, in High Pressure Chemistry and Biochemistry, edited by R. van Eldik and J. Jonas (D. Reidel Publishing, Dordrecht, 1987) pp. 193–236.Google Scholar
10. Podini, P. and Schnur, J.M., Chem. Phys. Lett. 93, 86 (1982).Google Scholar
11. Sandroff, C.J., King, H.E. Jr.,, Herschbach, D.R., J. Phys. Chem. 88, 5647 (1984).Google Scholar
12. Vanhecke, F. and Heremans, K., Proc. XIII ICORS, Wurtzberg, 1992, p. 638.Google Scholar
13. Melendres, C.A., McMahon, J.J. Ruther, W., J. Electroanal. Chem. 208, 175 (1986).Google Scholar
14. Melendres, C.A., Ruther, W., McMahon, J.J., in 10th International Congress on Metallic Corrosion”, Vol. IV, Nov. 87, Madras, India, (TRANS TECH PUBLICATIONS) p. 3841.Google Scholar
15. McMahon, J.J., Ruther, W., Melendres, C.A., J. Electrochem. Soc. 135, 557 (1988).Google Scholar