Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 135, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3601055
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Funding
- Ministry of Education, Science, Sports, and Culture [22760131]
- Grants-in-Aid for Scientific Research [22760131] Funding Source: KAKEN
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Molecular dynamics simulations of single water droplets on a solid surface were carried out in order to investigate the effects that the Coulomb interaction between liquid and solid molecules has on wetting behavior by appending vertical electric polarization on a solid surface. The water droplet became more wettable both on upward and downward polarized surfaces, although structures of the adsorption layer appearing near the solid surface were clearly different, and the relation between droplet contact angle and surface polarization was also different for upward and downward polarization directions. The probability density distribution of molecular orientation around the adsorption layer indicated that preferable water molecule orientations varied largely by the surface polarization, and the rotational mobility around the preferable orientations was also affected. The dynamic property due to this rotational mobility was clearly captured by means of distribution of rotational diffusion coefficient, which potentially corresponded to local viscosity distribution. (C) 2011 American Institute of Physics. [doi:10.1063/1.3601055]
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