TY - JOUR
T1 - Suppression of the dynamic transition in surface water at low hydration levels
T2 - A study of water on rutile
AU - Mamontov, Eugene
AU - Vlcek, Lukas
AU - Wesolowski, David J.
AU - Cummings, Peter T.
AU - Rosenqvist, Jörgen
AU - Wang, Wei
AU - Cole, David R.
AU - Anovitz, Lawrence M.
AU - Gasparovic, Goran
PY - 2009/5/22
Y1 - 2009/5/22
N2 - Our quasielastic neutron-scattering experiments and molecular-dynamics simulations probing surface water on rutile (TiO2) 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.
AB - Our quasielastic neutron-scattering experiments and molecular-dynamics simulations probing surface water on rutile (TiO2) 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.
UR - http://www.scopus.com/inward/record.url?scp=67549106823&partnerID=8YFLogxK
U2 - 10.1103/PhysRevE.79.051504
DO - 10.1103/PhysRevE.79.051504
M3 - Article
AN - SCOPUS:67549106823
SN - 1539-3755
VL - 79
JO - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
JF - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
IS - 5
M1 - 051504
ER -