Foolproof Method for Fast and Reversible Switching of Water-Droplet Adhesion by Magnetic Gradients

Reversible switching of water-droplet adhesion on solid surfaces is of great significance for smart devices, such as microfluidics. In this work, we designed a foolproof method for fast and reversible magnet-controlled switching of water-droplet adhesion surfaces by doping iron powders in soft poly­...

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Bibliographic Details
Published inACS applied materials & interfaces Vol. 9; no. 27; pp. 23238 - 23245
Main Authors Hou, Guanglei, Cao, Moyuan, Yu, Cunming, Zheng, Shuang, Wang, Dianyu, Zhu, Zhongpeng, Miao, Weining, Tian, Ye, Jiang, Lei
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 12.07.2017
Subjects
adhesion switching
fast
magnetic gradients
foolproof
reversible
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Summary:Reversible switching of water-droplet adhesion on solid surfaces is of great significance for smart devices, such as microfluidics. In this work, we designed a foolproof method for fast and reversible magnet-controlled switching of water-droplet adhesion surfaces by doping iron powders in soft poly­(dimethylsiloxane). The water adhesion is adjusted by magnetic field-induced structure changes, avoiding complex chemical or physical surface design. The regulation process is so convenient that only tens of milliseconds are needed. The on-site responsive mechanism extends its use to unusual curved surfaces. Moreover, the excellent reversibility and stability make the film an ideal candidate for real-time applications.
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ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.7b07409