Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 27, Pages 23238-23245Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b07409
Keywords
adhesion switching; fast; reversible; magnetic gradients; foolproof
Funding
- National Research Fund for Fundamental Key Projects [2013CB932802]
- National Natural Science Foundation [21473213, 21421061, 11290163]
- State High-Tech Development Plan [2012AA030305]
- Chinese Academy of Sciences [KJZD-EW-M03]
- 111 project [B14009]
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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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