Hydration-dependent dynamics of deeply cooled water under strong confinement

C. E. Bertrand; K. H. Liu; E. Mamontov; S. H. Chen

doi:10.1103/PhysRevE.87.042312

Hydration-dependent dynamics of deeply cooled water under strong confinement

C. E. Bertrand, K. H. Liu, E. Mamontov, S. H. Chen

Chemical Spectroscopy

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Abstract

We have measured the hydration-level dependence of the single-particle dynamics of water confined in the ordered mesoporous silica MCM-41. The dynamic crossover observed at full hydration is absent at monolayer hydration. The monolayer dynamics are significantly slower than those of water in a fully hydrated pore at ambient temperatures. At low temperatures, the opposite is found to be true. These results underscore the importance of water's tetrahedral hydrogen-bond network in accounting for its low temperature dynamic properties.

Original language	English
Article number	042312
Journal	Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume	87
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevE.87.042312
State	Published - Apr 26 2013

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abstract = "We have measured the hydration-level dependence of the single-particle dynamics of water confined in the ordered mesoporous silica MCM-41. The dynamic crossover observed at full hydration is absent at monolayer hydration. The monolayer dynamics are significantly slower than those of water in a fully hydrated pore at ambient temperatures. At low temperatures, the opposite is found to be true. These results underscore the importance of water's tetrahedral hydrogen-bond network in accounting for its low temperature dynamic properties.",

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AB - We have measured the hydration-level dependence of the single-particle dynamics of water confined in the ordered mesoporous silica MCM-41. The dynamic crossover observed at full hydration is absent at monolayer hydration. The monolayer dynamics are significantly slower than those of water in a fully hydrated pore at ambient temperatures. At low temperatures, the opposite is found to be true. These results underscore the importance of water's tetrahedral hydrogen-bond network in accounting for its low temperature dynamic properties.

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Hydration-dependent dynamics of deeply cooled water under strong confinement

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