Title: Adsorption-induced surface normal relaxation of a solid adsorbent
Author(s):

A.S. Usenko (Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine, 14b Metrolohichna St., 03680 Kyiv, Ukraine)

We investigate adsorption of a gas on the flat surface of a solid deformable adsorbent taking into account thermal fluctuations and analyze in detail the effect of thermal fluctuations on the adsorbent deformation in adsorption. The condition for coexistence of two states of a bistable system of adsorbed particles is derived. We establish the specific properties of the adsorption-induced surface normal relaxation of an adsorbent caused by thermal fluctuations. The mean transition times between two stable states of the bistable system are derived in the parabolic approximation and in the general case.

Key words: adsorption, isotherm, deformation, fluctuations, bistability, hysteresis
PACS: 68.43.-h, 68.43.Mn, 68.43.Nr, 68.35.Rh

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