Role of confinement in water solidification under electric fields

作     者：Guo-Xi Nie Yu Wang Ji-Ping Huang 

作者机构：Department of Physics State Key Laboratory of Surface Physics and Collaborative Innovation Center of Advanced Microstructures Fudan University Shanghai 200433 China Department of Physics Zhejiang Agriculture and Forestry University Hangzhou 311300 China Department of Physics State Key Laboratory of Surface Physics and Collaborative Innovation Center of Advanced Microstructures Fudan University Shanghai 200433 China 

出 版 物：《Frontiers of physics》 (物理学前沿（英文版）)

年 卷 期：2015年第10卷第5期

页      面：59-67页

核心收录：

学科分类：080503[工学-材料加工工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0704[理学-天文学] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

基　　金：We acknowledge the financial support by the National Natural Science Foundation of China under Grant Nos. 11222544 and 11304284 (Y. Wang)  the Fok Ying Tung Edu- cation Foundation under Grant No. 131008  the Program for New Century Excellent Talents in University (Grant No. NCET-12- 0121)  and the CNKBRSF under Grant No. 2011CB922004. The computational resources utilized in this research were provided by Shanghai Supercomputer Center 

主　　题：molecular dynamics simulations water electric fields confinement 

摘      要：In contrast to the common belief that confinement promotes water solidification, here we show by molecular dynamics simulations that confinement can impede water solidification under electric fields. The behavior is evidenced by the increase in critical electric field strength for water solidifi- cation as the confinement progresses. We also show that the solidification occurs more easily with a parallel field than a perpendicular one. We understand and generalize these results by developing an energy theory incorporated with the anisotropic Clausius-Mossotti equation. It is revealed that the underlying mechanism lies in the confinement effect on molecules＇ electro-orientations. Thus, it be- comes possible to achieve electro-freezing （i.e., room-temperature ice） by choosing both confinement and electric fields appropriately.