The hysteretic displacement of an SF6 monolayer on graphite by Kr was studied using infrared reflection absorption spectroscopy supplemented by ellipsometry. The SF6 molecule has a strong IR-active vibrational mode (ν3) at 948.0 cm−1. The coverage and local density of the SF6 monolayer are inferred from the ν3 absorption peak area and the blue shift of the ν3 mode, respectively, the latter due to dynamic

In this work we studied interactions of polycyclic aromatic hydrocarbons (PAHs) with surfaces of two iron oxyhydroxide polymorphs, goethite and lepidocrocite, by means of density functional theory (DFT) method. The first focus here was to obtain adsorption energies of selected PAH molecules with the (110) goethite surface and the (010) lepidocrocite surface by performing DFT calculations with the inclusion

Melting of 3D solids is often preceded by a premelting of their surface, a distinct process which begins at a temperature lower than TM (bulk melting temperature). Premelting is usually investigated by non-contact techniques like diffraction or elipsometry, revealing how the surface layer becomes progressively disordered with temperature. Although this disordered surface layer is called a “quasiliquid”

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According to Onsager’s phenomenological theory, the diffusion fluxes of coadsorbed particles are expressed via the gradients of their chemical potentials and can contain the off-diagonal terms. In the conventional two-dimensional lattice-gas models with jumps of monomers to nearest-neighbour vacant sites, such terms are absent at the mean-field (MF) level or in the framework including the statistical