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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.
|Number of pages||4|
|Journal||Journal of Physics: Conference Series|
|Early online date||10 Jun 2013|
|Publication status||Published - 2013|
|Event||16th International Conference on Positron Annihilation - Bristol, UK United Kingdom|
Duration: 19 Aug 2012 → 24 Aug 2012