Wetting behavior of a colloidal particle trapped at a composite liquid-vapor interface of a binary liquid mixture

A partially miscible binary liquid mixture, composed of and B particles, is considered theoretically under conditions for which a stable A-rich phase in thermal equilibrium with the vapor phase. The B-rich metastable. liquids thermodynamic are chosen such, that interface between contains an intervening wetting film In order to obtain information about large-scale fluid structure around colloidal particle, trapped at such composite liquid-vapor interface, three related linked phenomena planar liquid-vapor, wall-liquid, wall-vapor interfaces studied analytically, using classical density functional theory conjunction sharp-kink approximation number profiles particles. If accordance so-called mixing rule strength A-B interaction given by geometric mean strengths A-A B-B interactions, similarly ratio wall-A wall-B interaction, scenario, colloid enclosed liquid, can be excluded. Up six distinct scenarios possible, if above rules fluid-wall fluid-fluid interactions relaxed. way space system parameters divided into domains corresponding scenarios, actually appear, depends on signs deviations from prescriptions. Relevant emerge, reduced as compared prescription, or increased values one prescription. range, within contact angle may vary inside various domains, also studied.