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  • 标题:Electrically Controlled Membranes Exploiting Cassie-Wenzel Wetting Transitions
  • 本地全文:下载
  • 作者:Edward Bormashenko ; Roman Pogreb ; Sagi Balter
  • 期刊名称:Scientific Reports
  • 电子版ISSN:2045-2322
  • 出版年度:2013
  • 卷号:3
  • 期号:1
  • DOI:10.1038/srep03028
  • 语种:English
  • 出版社:Springer Nature
  • 摘要:We report electrically controlled membranes which become permeable when an electrical field is exerted on a droplet deposited on the membrane. Micro-porous polycarbonate membranes are obtained with the breath-figures assembly technique, using micro-scaled stainless steel gauzes as supports. The membranes demonstrate pronounced Cassie-Baxter wetting. Air cushions trapped by the droplet prevent water penetration through the membrane. We demonstrate two possibilities for controlling the permeability of the membrane, namely contact and non-contact scenarios. When an electrical field is exerted on a droplet deposited on the membrane, the triple-line is de-pinned and the wetting transition occurs in the non-contact scheme. Thus, the membrane becomes permeable. The contact scheme of the permeability control is based on the electrowetting phenomenon.
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