https://scholars.lib.ntu.edu.tw/handle/123456789/598154
標題: | Statics and dynamics of nanodroplet electrowetting on an isothermally heated nanostructured surface | 作者: | Zhang B.-X Wang S.-L He X Yang Y.-R Wang X.-D Lee D.-J. DUU-JONG LEE |
關鍵字: | Electrowetting;Evaporation;Hydrogen bonds;Nanodroplet;Pinning;Electric fields;Isotherms;Molecular dynamics;Nanostructured materials;Dynamic contact angle;Nano-droplets;Nanostructured surface;Static contact angle;Statics and dynamics;Substrates temperature;Vertical electric fields;Water nanodroplets;Wetting | 公開日期: | 2021 | 卷: | 342 | 來源出版物: | Journal of Molecular Liquids | 摘要: | The statics and dynamics of electrowetting of a water nanodroplet on an isothermally heated nanostructured surface subjected to a vertical electric field are investigated via molecular dynamics (MD) simulations. The simulation results reveal that when imposing a constant electric field on the water nanodroplet, the static and dynamic contact angles of the water nanodroplet are always decreased with increasing the substrate temperature. At the same time, the spreading becomes faster at higher substrate temperatures. In the no-temperature-difference scenario, the statics and dynamics of electrowetting are found to strongly depend on the field strength and direction owing to small droplet sizes. Intriguingly, this dependence weakens with increasing the substrate temperature even completely disappears at high enough substrate temperatures. The result in the finite-temperature-difference scenario can be attributed to the weakened pining effect caused by vigorous evaporation in the vicinity of the contact line as well as the decreased liquid–vapor interfacial tension (or increased spreading coefficient) arising from the elevated interface temperature. ? 2021 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114490286&doi=10.1016%2fj.molliq.2021.117468&partnerID=40&md5=06894d07d1a253b825873a5610c49230 https://scholars.lib.ntu.edu.tw/handle/123456789/598154 |
ISSN: | 01677322 | DOI: | 10.1016/j.molliq.2021.117468 |
顯示於: | 化學工程學系 |
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