Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 367, Issue -, Pages 450-454Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2011.11.008
Keywords
Thin film; Wettability; Leidenfrost droplet; Droplet control; Microfluidic system
Categories
Funding
- National Nature Science Foundation of China [50775212, 20306014]
- Outstanding Talent Recruiting Program [2009A31004]
- Ningbo municipal government
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The droplet control, especially for the self-propelled Leidenfrost droplet, has attracted many researchers' attention in applied and fundamental fields. In this paper, the ratchet thin film was fabricated by magnetron sputtering and hybrid ion beams deposition. The micro- and nanoscale structure of the film was characterized by field emission scanning electron microscope. This study reports an interesting phenomenon that the self-propelled Leidenfrost water droplet was initiated at low temperature. The Leidenfrost point of droplets was controlled by the surface wettability and parameters of the asymmetric ratchet substrate. This novel self-propelled interfacial material and preparation technology can be expanded to the manufacture process and constructed a temperature-dependent tubule for microfiuidic systems. (C) 2011 Elsevier Inc. All rights reserved.
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