Adsorption of Ar on planar surfaces studied with a density functional theory
The adsorption of Ar on planar structureless substrates of alkali metals, alkaline-earth metal Mg, CO2, and Au was analyzed by applying a density functional formalism which includes a recently proposed effective attractive pair potential conditioned to Ar. It is shown that this approach reproduces t...
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| Autores principales: | , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_15393755_v80_n5_p_Sartarelli |
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| Sumario: | The adsorption of Ar on planar structureless substrates of alkali metals, alkaline-earth metal Mg, CO2, and Au was analyzed by applying a density functional formalism which includes a recently proposed effective attractive pair potential conditioned to Ar. It is shown that this approach reproduces the experimental surface tension of the liquid-vapor interface over the entire bulk coexistence curve for temperatures T spanning from the triple point Tt up to the critical point Tc. The wetting properties were studied over the entire range temperatures Tt Tc. It was found that Ar wets all the investigated surfaces. The adsorption isotherms for alkali metals exhibit first-order phase transitions. Prewetting lines were resolved even for the less attractive surfaces. In the cases of Mg, CO2, and Au a continuous growth for T Tt was obtained. A comparison with experimental data and other microscopic calculations is reported. © 2009 The American Physical Society. |
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