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 in:ACS applied materials & interfaces 2017-07, Vol.9 (27), p.23238-23245
Main Authors: Hou, Guanglei, Cao, Moyuan, Yu, Cunming, Zheng, Shuang, Wang, Dianyu, Zhu, Zhongpeng, Miao, Weining, Tian, Ye, Jiang, Lei
Format: Article
Language:English
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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.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.7b07409