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Glass transition and crystallization dynamics of thin CCl2F2 films deposited on Ni(111), graphite, and water-ice films

J. Chem. Phys. 131, 164501 (2009); doi:10.1063/1.3245865

Published 22 October 2009

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Ryutaro Souda
International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
The glass-liquid transition and crystallization of thin CCl2F2 films, as well as the influence of substrates on the phase transition of a monolayer, have been investigated using temperature-programmed time-of-flight secondary ion mass spectrometry. The multilayer films of CCl2F2 dewet a Ni(111) substrate abruptly at 57 K, which is explainable as immediate crystallization of supercooled liquid. The morphology of the crystalline CCl2F2 film changes at 85 K; the molecules permeate through porous D2O films at temperatures higher than 70 K. These behaviors can be explained as the evolution of a second liquid or premelting of crystallites. The monolayer of CCl2F2 formed on graphite undergoes a phase transition similar to that of the multilayer films, whereas the phase transition is quenched for the monolayer formed on the Ni(111) substrate. The phase transition of the CCl2F2 monolayer formed on the D2O film is influenced by crystallinity, thickness, and morphology of the latter. ©2009 American Institute of Physics
History: Received 24 June 2009; accepted 21 September 2009; published 22 October 2009
Permalink: http://link.aip.org/link/?JCPSA6/131/164501/1
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KEYWORDS and PACS

Keywords
PACS
  • 64.70.P-
    Glass transitions of specific systems
  • 79.20.Rf
    Atomic, molecular and ion beam impact and interactions with surfaces
  • 64.70.D-
    Solid-liquid transitions
  • YEAR: 2009

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ISSN:
0021-9606 (print)   1089-7690 (online)
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