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Artículo
Adsorption behaviour of the binary mixtures of octane and nonane at sub-monolayer coverage on graphite
Autor/es | Castro Arroyo, Miguel Ángel
Clarke, Stuart M. Inaba, Akira Thomas, Robert K. Arnold, Thomas |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica |
Fecha de publicación | 2001 |
Fecha de depósito | 2015-03-03 |
Publicado en |
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Resumen | The behaviour of binary mixtures of octane and nonane adsorbed on graphite has been investigated with a
combination of adiabatic calorimetry and neutron di†raction. In contrast to the eutectic behaviour of
monolayers of ... The behaviour of binary mixtures of octane and nonane adsorbed on graphite has been investigated with a combination of adiabatic calorimetry and neutron di†raction. In contrast to the eutectic behaviour of monolayers of these materials at higher coverages, this combination of alkanes is found to form mixed crystals on the surface over an extensive composition range at the sub-monolayer coverages investigated here. In the mixed phase the shorter octane molecules are incorporated into the lattice of the longer nonane molecules. This incorporation occurs despite pure octane and nonane monolayers having di†erent symmetries and is attributed to the expanded nature of the submonolayer phases, relative to higher coverage monolayers, providing room for mixed crystal formation. |
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