Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 25, Issue 26, Pages 4114-4119Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201501320
Keywords
antigravity delivery; droplet manipulation; Laplace pressure; superhydrophobic pump; surface energy
Categories
Funding
- National Natural Science Foundation of China [21273016, 21421061]
- National Basic Research Program of China [2013CB933003]
- Program for New Century Excellent Talents in University
- Beijing Higher Education Young Elite Teacher Project
- Fundamental Research Funds for the Central Universities
- 111 project [B14009]
- Chinese Academy of Sciences [KJZDEW-M01, KJZDEW-M03]
- Beijing Academy of Science and Technology [PXM2014-178304-000001-00130138]
- Innovation Foundation of BUAA
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Antigravity transportation of water, which is often observed in nature, is becoming a vital demand for advanced devices and new technology. Many studies have been devoted to the motion of a single droplet on a horizontal or inclined substrate under specific assistance. However, the self-propelled water motion, especially continuous antigravity water delivery, still remains a considerable challenge. Here, a novel self-ascending phenomenon driven only by the surface energy release of water droplets is found, and a superhydrophobic mesh to pump water up to a height of centimeter scale is designed. An integrated antigravity transportation system is also demonstrated to continuously and spontaneously pump water droplets without additional driving forces. The present novel finding and integrated devices should serve as a source of inspiration for the design of advanced materials and for the development of new technology with exciting applications in microfluidics, microdetectors, and intelligent systems.
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