Observations of the growth and sublimation of water ice films by variable-energy positron annihilation spectroscopy

S. Townrow, P.G. Coleman, Y.C. Wu, J. Jiang, S.J. Wang

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Abstract

The near-surface structure of thin vapor-deposited water ice films during formation and sublimation in vacuum has been probed using in-situ positron annihilation spectroscopy. While amorphous solid water films prepared at 120K are highly dense with low porosity micro- and interconnected meso-pores have been observed in the top few tens of nm of ice films prepared at temperature of 170-180K as the films are forming and during sublimation. Responses to these near-surface pores are much more pronounced in films grown at 170-180K than in those grown at lower temperatures.
Original languageEnglish
Article number012058
Number of pages4
JournalJournal of Physics: Conference Series
Volume443
Issue number1
Early online date10 Jun 2013
DOIs
Publication statusPublished - 2013
Event16th International Conference on Positron Annihilation - Bristol, UK United Kingdom
Duration: 19 Aug 201224 Aug 2012

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