Suppression of the dynamic transition in surface water at low hydration levels: A study of water on rutile.

Journal Article · Fri May 01 00:00:00 EDT 2009 · Physical Review E

DOI:https://doi.org/10.1103/PhysRevE.79.051504· OSTI ID:1007870

Mamantov, Gleb M ^[1]; Vlcek, Lukas ^[1]; Wesolowski, David J ^[1]

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1. ORNL

Our quasielastic neutron-scattering experiments and molecular-dynamics simulations probing surface water on rutile (TiO{sub 2}) have demonstrated that a sufficiently high hydration level is a prerequisite for the temperature-dependent crossover in the nanosecond dynamics of hydration water. Below the monolayer coverage of mobile surface water, a weak temperature dependence of the relaxation times with no apparent crossover is observed. We associate the dynamic crossover with interlayer jumps of the mobile water molecules, which become possible only at a sufficiently high hydration level.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1007870
• Journal Information: Physical Review E, Journal Name: Physical Review E Journal Issue: 5 Vol. 79; ISSN 1539-3755
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
HYDRATION
RELAXATION TIME
RUTILE
SURFACE WATERS
TEMPERATURE DEPENDENCE
WATER