Dynamic solidification in nanoconfined water films

Mechanical properties of nanoconfined water layers are still poorly understood and continue to create controversy, despite their importance for biology and nanotechnology. We report on dynamic nanomechanical measurements of water films compressed to a few single molecular layers. We show that the me...

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Bibliographic Details
Published in:Physical review letters 2010-08, Vol.105 (10), p.106101-106101, Article 106101
Main Authors: Khan, Shah H, Matei, George, Patil, Shivprasad, Hoffmann, Peter M
Format: Article
Language:English
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Summary:Mechanical properties of nanoconfined water layers are still poorly understood and continue to create controversy, despite their importance for biology and nanotechnology. We report on dynamic nanomechanical measurements of water films compressed to a few single molecular layers. We show that the mechanical properties of nanoconfined water layers change significantly with their dynamic state. In particular, we observed a sharp transition from viscous to elastic response even at extremely slow compression rates, indicating that mechanical relaxation times increase dramatically once water is compressed to less than 3-4 molecular layers.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.105.106101