期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 34, 页码 29248-29254出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b08116
关键词
laser direct writing; water collection; superhydrophobic; hierarchical patterns; microfluidics
资金
- National Natural Science Foundation of China [U1613204, 10974037, 61505038, 61405223]
- Program for Guangdong Introducing Innnovative and Entrepreneurial Team [2016ZT06G587]
- The Recruitment Program of Global Youth Experts of China [K16251101]
- National Key Research and Development Program of China [2016YFA0200403]
- CAS Strategy Pilot Program [XDA 09020300]
- Shenzhen Science and Technology Planning [JCYJ20160422142912923]
Directional water collection has stimulated a great deal of interest because of its potential applications in the field of microfluidics, liquid transportation, fog harvesting, and so forth. There have been some bio or bioinspired structures for directional water collection, from one-dimensional spider silk to two-dimensional star-like patterns to three-dimensional Nepenthes alata. Here we present a simple way for the accurate design and highly controllable driving of tiny droplets: by laser direct writing of hierarchical patterns with modified wettability and desired geometry on a superhydrophobic film, the patterned film can precisely and directionally drive tiny water droplets and dramatically improve the efficiency of water collection with a factor of similar to 36 compared with the original superhydrophobic film. Such a patterned film might be an ideal platform for water collection from humid air and for planar microfluidics without tunnels.
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