Hostname: page-component-745bb68f8f-kw2vx Total loading time: 0 Render date: 2025-01-28T23:16:46.902Z Has data issue: false hasContentIssue false
  • English
  • Français

In Situ X-Ray Scattering of Monolayers Adsorbed at Electrochemical Interfaces.

Published online by Cambridge University Press:  21 February 2011

Michael F. Toney  and
Owen. R Melroy
Michael F. Toney
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120-6099
Owen. R Melroy
Affiliation:
IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120-6099
Get access

Abstract

Surface x-ray scattering has been used to study in-situ the structure of Pb monolayers electrochemically adsorbed on Ag (111) electrodes. Pb forms an incommensurate, hexagonal two-dimensional (2D) solid, which is rotated approximately 4.5° from the substrate symmetry directions and compressed relative to bulk Pb. Between monolayer formation and bulk deposition, the Pb-Pb near neighbor distance decreases linearly with applied potential. Due to the chemical equilibrium between the Pb monolayer and the Pb in solution, the isothermal compressibility of the monolayer can be measured and is in good agreement with that calculated for a 2D non-interacting free electron gas model of the monolayer. It is observed that the intensity of surface diffraction from the Ag substrate (the Ag crystal truncation rod) decreases when the Pb monolayer is adsorbed, although the cause of this is not known.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 143: Symposium V – Synchrotron Radiation in Materials Research , 1988 , 37
Copyright
Copyright © Materials Research Society 1989

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. Hubbard, A., Acc. Chem. Res. 13, 177 (1980); E. Yeagar, J. Electroanal. Chem. 128, 1600 (1981); P.N. Ross, Surf. Sci. 102, 463 (1981).CrossRefGoogle Scholar
2. Fleischmann, M., Hendra, P.J., and McQuillan, A.J., Chem. Phys. Lett. 26, 173 (1974); D.J. Jeanmaire and R.P. Van Duyne, J. Electroanal. Chem. 84, 1 (1977).CrossRefGoogle Scholar
3. Richmond, G.L., Robinson, J.M., and Shannon, V.L., Prog. Surf. Sci. 28, 1 (1988).CrossRefGoogle Scholar
4. Pons, S., J. Electroanal. Chem. 150, 495 (1983); A. Bewick, J. Electroanal. Chem. 150, 481 (1983).Google Scholar
5. Kolb, D.M. in Advances in Electrochemistry and Electrochemical Engineering, Vol 11, Gerischer, H. and Tobias, C., Eds., (Wiley, New York, 1978) p. 125.Google Scholar
6. Kolb, D.M., J. Vac. Sci. Technol. A4, 1294 (1986) and references therein.Google Scholar
7. Takayanagi, K., Kolb, D.M., Kambe, K. and Lehmpfuhl, G., Surf. Sci. 100, 407 (1980); K. Takayanagi, Surf. Sci. 104, 527 (1981).CrossRefGoogle Scholar
8. Samant, M.G., Toney, M.F., Borges, G.L., Blum, L. and Melroy, O.R., Surf. Sci. 193, L29 (1988); J. Phys. Chem. 92, 220 (1988).Google Scholar
9. Als-Nielsen, J. in Structure and Dynamics of Surfaces,Vol. II, Schommers, W. and von Blanckenhagen, P., eds. (Springer-Verlag, Berlin, 1987) pp.181; I.K. Robinson in Handbook on Synchrotron Radiation, D.E. Moncton and G.S. Brown, eds. (North Holland, Amsterdam, 1988).Google Scholar
10. Melroy, O.R., Toney, M.F., Borges, G.L., Samant, M.G., Kortright, J.B., Ross, P.N., and Blum, L., Phys. Rev. B 38, (1988); J. Eelctroanal. Chem., in press.Google Scholar
11. Rawlings, K.J., Gibson, M.J. and Dobson, P.J., J. Phys. D 11, 2059 (1978).CrossRefGoogle Scholar
12. Ashcroft, N.W. and Mermin, N.D., Solid State Physics, (Saunders, Philadelphia, 1976).Google Scholar
13. Siegenthaler, H. and Juttner, K., Electrochimica Acta 24, 109 (1979).Google Scholar
14. Shaw, C.G. and Fain, S.C., Phys. Rev. Lett. 41, 955 (1978); D. Doering and S. Semancik, Phys. Rev. Lett. 53, 66 (1984); T. Aruga, H. Tochihara, and Y. Murata Phys. Rev. Lett. 52, 1794 (1984).CrossRefGoogle Scholar
15. McTague, J.P. and Novaco, A.D., Phys. Rev. B 19, 5299 (1979).Google Scholar
16. Shiba, H., J. Jap. Phys. Soc. 46, 1852 (1979); 48, 211 (1980).CrossRefGoogle Scholar
17. Toney, M.F., Gordon, J.G., Melroy, O.R., Borges, G.L., Samant, M.G., Kau, G., Yee, D., and Sorensen, L., unpublished.Google Scholar
18. Andrews, S. and Cowley, R., J. Phys. C 18, 6427 (1985). I.K.Robinson, Phys. Rev. B 33, 3830 (1986).Google Scholar