Weber, William J. and Goodstein, David L. (1999) Theory and Observation of Displacement Phenomena in Coadsorbed Films. Physical Review Letters, 83 (19). pp. 3888-3891. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:WEBprl99
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Displacement refers to a surprising phenomenon observed in a number of adsorption systems. At low temperatures, some relatively inert gases, such as krypton (Kr) or methane ( CH4), are found to displace molecules from preadsorbed monolayer films of a more condensable species, such as carbon tetrachloride ( CCl4), from a graphite substrate. We present a simple thermodynamic model to explain displacement and make a prediction applicable to both first-order and continuous displacement processes. We also present measurements on CH4/CCl4 and Kr/CCl4 coadsorbed films from 77–112 K that verify our prediction and yield the CCl4 film spreading pressure.
|Additional Information:||©1999 The American Physical Society Received 3 May 1999|
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|Deposited On:||13 Dec 2006|
|Last Modified:||26 Dec 2012 09:22|
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