Some observations on the surface sensitivity of photoelectron spectroscopy
- 29 December 1972
- journal article
- Published by The Royal Society in Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
- Vol. 331 (1586) , 383-394
- https://doi.org/10.1098/rspa.1972.0185
Abstract
As an essential preliminary to applying a number of different photoelectron spectroscopic methods to investigate the mechanism of solid/gas reactions their surface sensitivity has been explored. Data are reported for the sensitivity of e. s. c. a. for H2O, CO2 and CO adsorbed on Au. Also the interaction of mercury vapour with Au has been studied, adsorption and lattice penetration of the mercury being observed by monitoring the Hg(4f) peaks. In general, less than 10% of a monolayer of H2O and CO2 is detectable by X-ray photoelectron spectroscopy. Significant chemical shifts are observed between C(1s) present as an impurity in the Au lattice and C(1s) in adsorbed CO2, and also between O(1s) in H2O(ads) and CO2(ads). The surface sensitiveness of u. v. and X-ray photoelectron spectroscopy are compared.Keywords
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