Abstract
The techniques of infrared reflection absorption spectroscopy (IRAS) and electron energy loss spectroscopy (EELS) are described in the context of their application to the study of adsorbates in sub-monolayer concentrations on single crystal metal surfaces. It is shown that whereas the two methods have essentially equivalent sensitivity, the ease of access to a wide spectral range in EELS favours its use in vibrational analysis. The advantages of IRAS lie in its intrinsically high resolution and accurate intensity information as well as in its potential use under high pressure conditions. Examples from the recent literature are used to illustrate these features.
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