Foolproof Method for Fast and Reversible Switching of Water-Droplet Adhesion by Magnetic Gradients
ACS Applied Materials & Interfaces2017Vol. 9(27), pp. 23238–23245
Citations Over TimeTop 16% of 2017 papers
Guanglei Hou, Moyuan Cao, Cunming Yu, Shuang Zheng, Dianyu Wang, Zhongpeng Zhu, Weining Miao, Ye Tian, Lei Jiang
Abstract
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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