The digital electron-stimulated-desorption-ion-angular-distribution method has been used to observe the amplitude of the low-frequency "frustrated-translational" modes of chemisorbed CO on Pt(111) when the CO adsorbs on empty Pt sites present in a p(2×2)-Se overlayer. Significant changes in the CO vibrational amplitudes are observed during a two-dimensional phase transition driven by repulsive forces in the overlayer. This work represents the first observation of the relationship between the vibrational amplitude of an adsorbed molecule and a phase transformation in an overlayer.
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Кискинова et al. (1988) studied this question.
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