Phase separation of carboxylic acids on graphite surface at submonolayer regime

Alba, M. D. and Bickerstaffe, A. K. and Castro, M. A. and Clarke, S. M. and Medina, S. and Millán, C. and Orta, M. M. and Pavón, E. and Perdigón, A. C. (2009) Phase separation of carboxylic acids on graphite surface at submonolayer regime. The European Physical Journal - Special Topics, 167 (1). pp. 151-156. DOI 10.1140/epjst/e2009-00951-6

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Official URL: http://dx.doi.org/10.1140/epjst/e2009-00951-6

Abstract

Abstract Mixing behaviour of solid crystalline monolayers adsorbed onto graphite from different mixtures of undecanoic and dodecanoic acids at submonolayer coverage has been investigated. X-ray diffraction measurements have been collected from a variety of compositions as a function of temperature. An extensive phase separation is found for all the compositions – the scattering patterns characteristic of the pure material crystalline structures being preserved across the entire composition range. The temperature dependence of the monolayer melting points and their depression is also clearly indicative of separation of the two surface components, in clear contrast to that expected if the two carboxylic acids mixed ideally in the monolayer.

Item Type: Article
Additional Information: BPI, cml
Uncontrolled Keywords: 09AREP; BPI;
Subjects: 99 - Other
Divisions: 99 - Other
Journal or Publication Title: The European Physical Journal - Special Topics
Volume: 167
Page Range: pp. 151-156
Identification Number: 10.1140/epjst/e2009-00951-6
Depositing User: Sarah Humbert
Date Deposited: 01 Apr 2010 15:30
Last Modified: 23 Jul 2013 09:57
URI: http://eprints.esc.cam.ac.uk/id/eprint/1366

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