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Low-temperature dynamics of water confined in a hydrophobic mesoporous material

Author(s)
Chu, Xiang-qiang; Lu, Kao-Hsiang; Tyagi, Madhu Sudan; Mou, Chung-Yuan; Chen, Sow-Hsin
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Abstract
Quasielastic neutron scattering was used to study the dynamics of three-dimensional confined water in a hydrophobic mesoporous material designated as CMK-1 in the temperature range from 250 to 170 K. We observe a crossover phenomenon at temperature TL. We find that TL of water confined in CMK-1 occurs in between previous observations of one-dimensional confined water in materials with different hydrophilicities. This provides the first evidence that besides the obvious surface effect brought about by the hydrophobic confinements, TL is also dependent on the dimensionality of the geometry of the confinement.
Date issued
2010-08
URI
http://hdl.handle.net/1721.1/60392
Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Journal
Physical Review E
Publisher
American Physical Society
Citation
Chu, Xiang-qiang. et al. "Low-temperature dynamics of water confined in a hydrophobic mesoporous material." Physical Review E 82.2 (2010): 020501(R). © 2010 The American Physical Society
Version: Final published version
ISSN
1550-2376
1539-3755

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