Influence of Homogeneous Electric Field on the Structure and Growth of Ice

XX Zhang and M Chen, ACTA PHYSICO-CHIMICA SINICA, 30, 1208-1214 (2014).

DOI: 10.3866/PKU.WHXB201405095

Homogeneous crystallization of supercooled water under electric field with strength ranging from 4.0 to 40.0 V.nm(-1) was investigated by using molecular simulation technique. The liquid-solid transition was successfully obtained based on ice component analysis using the CHILL algorithm. The analysis suggested that the produced crystalline was cubic ice dominant. The influence of the field strength on the structure and the growth rate of the ice was studied. The results revealed that the presence of an electric field drove the system to crystallize rapidly into dense and distorted cubic ice. The density of the crystals increased as a function of the field strength, from 0.98 to 1.08 The growth rate of the ice nucleus increased along with the field strength according to the characteristic time derived from the Avrami equation which ranged from 0.254 to 5.513 ns. This type of acceleration can be partially attributed to the enhancement of the rotational dynamics of the water molecules. Moreover, by monitoring the formation history of the cubic ice, we found that the defective ice acted as a transition state linking the liquid water and the cubic ice.

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