Abstract

The work analyzes the energy characteristics of rough interfaces with and without taking into account adsorption. For simplicity, the theory of the lattice gas model is exemplified by taking into account a lateral interaction between the nearest components of the system. The behavior of the surface free and internal energies of the interface between the rough solid and the adsorbed gas is considered. The effect of the non-equilibrium states of interfaces on the energy characteristics of the surface are analyzed depending on the formation temperature of a flat rough surface. The difference between the excess surface energy at the solid–mobile phase interface and the non-equilibrium analogue of the surface tension of the same system, which transforms into the surface tension in the complete equilibrium state, is discussed. The effect of adsorption on the energy characteristics of the flat rough surface and the position of the equimolar surface is explored, depending on the gas pressure during physical adsorption and chemisorption. The means of calculating the fluctuation estimates of the formation probability of a rough solid boundary from the metastable state with a flat boundary is formulated. The size dependences of the formation probability of a circular region with a rough solid boundary on its curvature radius are obtained.

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