Unified stress tensor of the hydration water layer.
We present the general stress tensor of the ubiquitous hydration water layer (HWL), based on the empirical hydration force, by combining the elasticity and hydrodynamics theories. The tapping and shear component of the tensor describe the elastic and damping properties of the HWL, respectively, in good agreement with experiments. In particular, a unified understanding of HWL dynamics provides the otherwise unavailable intrinsic parameters of the HWL, which offer additional but unexplored aspects to the supercooled liquidity of the confined HWL. Our results may allow deeper insight on systems where the HWL is critical.
Department of Physics and Astronomy, Seoul National University, Gwanak-gu, Seoul 151-747, Republic of Korea.
Bongsu
B
Kim
Department of Physics and Astronomy, Seoul National University, Gwanak-gu, Seoul 151-747, Republic of Korea.
Qhwan
Q
Kim
Department of Physics and Astronomy, Seoul National University, Gwanak-gu, Seoul 151-747, Republic of Korea.
Soyoung
S
Kwon
Department of Physics and Astronomy, Seoul National University, Gwanak-gu, Seoul 151-747, Republic of Korea.
Sangmin
S
An
Department of Physics and Astronomy, Seoul National University, Gwanak-gu, Seoul 151-747, Republic of Korea.
Kunyoung
K
Lee
Department of Physics and Astronomy, Seoul National University, Gwanak-gu, Seoul 151-747, Republic of Korea.
Manhee
M
Lee
Department of Physics and Astronomy, Seoul National University, Gwanak-gu, Seoul 151-747, Republic of Korea.
Wonho
W
Jhe