TY - JOUR
T1 - Hydration-dependent dynamic crossover phenomenon in protein hydration water
AU - Wang, Zhe
AU - Fratini, Emiliano
AU - Li, Mingda
AU - Le, Peisi
AU - Mamontov, Eugene
AU - Baglioni, Piero
AU - Chen, Sow Hsin
N1 - Publisher Copyright:
© 2014 American Physical Society.
PY - 2014/10/8
Y1 - 2014/10/8
N2 - The characteristic relaxation time τ of protein hydration water exhibits a strong hydration level h dependence. The dynamic crossover is observed when h is higher than the monolayer hydration level hc=0.2-0.25 and becomes more visible as h increases. When h is lower than hc, τ only exhibits Arrhenius behavior in the measured temperature range. The activation energy of the Arrhenius behavior is insensitive to h, indicating a local-like motion. Moreover, the h dependence of the crossover temperature shows that the protein dynamic transition is not directly or solely induced by the dynamic crossover in the hydration water.
AB - The characteristic relaxation time τ of protein hydration water exhibits a strong hydration level h dependence. The dynamic crossover is observed when h is higher than the monolayer hydration level hc=0.2-0.25 and becomes more visible as h increases. When h is lower than hc, τ only exhibits Arrhenius behavior in the measured temperature range. The activation energy of the Arrhenius behavior is insensitive to h, indicating a local-like motion. Moreover, the h dependence of the crossover temperature shows that the protein dynamic transition is not directly or solely induced by the dynamic crossover in the hydration water.
UR - http://www.scopus.com/inward/record.url?scp=84907856327&partnerID=8YFLogxK
U2 - 10.1103/PhysRevE.90.042705
DO - 10.1103/PhysRevE.90.042705
M3 - Article
C2 - 25375521
AN - SCOPUS:84907856327
SN - 1539-3755
VL - 90
JO - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
JF - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
IS - 4
M1 - 042705
ER -