Dynamics of ions on ice surface

PHYS 432

Tomoko Ikeda-Fukazawa, fukazawa@isc.meiji.ac.jp, Department of Applied Chemistry, Meiji University, Higashimita 1-1-1 , Tama-ku, Kawasaki, 214-8571, Japan
The surface melting of ice below the bulk melting point is well-established but little-understood phenomenon. In order to investigate the effects of impurities on the surface melting, we perform molecular dynamics simulations of ice surface with NO3–, Cl–, Na+ and H+. The vibrational density of state shows that the collective dangling vibrations of the free O-H bonds are excited around the ions with the negative charge. We conclude that the collective vibration is the dominant factor governing the enhancement of the melting.

[1]T. Ikeda-Fukazawa, K. Kawamura, Molecular dynamics studies of surface of ice Ih, J. Chem. Phys. 120 (2004) 1395. [2]T. Ikeda-Fukazawa, K. Kawamura, Effects of Ions on Dynamics of Ice Surface, Chem. Phys. Lett. 417 (2006) 561.

 

Poster Session
7:30 PM-10:00 PM, Wednesday, 13 September 2006 Moscone Center -- Hall D, Poster

Division of Physical Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006