期刊
LANGMUIR
卷 31, 期 13, 页码 4032-4039出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.5b00328
关键词
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资金
- National Basic Research Program of China [2012CB933800]
- National Natural Science Foundation of China [21222406, 21474037, 91123031, 21221063]
- Program for New Century Excellent Talents in University
- Ministry of Education of China [20130061110019]
- Science and Technology Development Program of Jilin Province
We report the flow behavior of water in microfluidic systems based on a chemically patterned anisotropic wetting surface. When water flows inside a microchannel on top of a micropatterned surface with alternating hydrophilic/hydrophobic stripes, it exhibits an anisotropic flowing characteristic owing to the anisotropic wettability; thus, the patterned surface acts as a microvalve for the microfluidic system. The anisotropic flow of water is influenced by the microscale features of the patterns and the dimensions of the microchannels. Furthermore, by reasonably combining the patterned surface and microchannel together, we realize the transportation of water in a microchannel along a virtual wall, which is the boundary of the hydrophilic and hydrophobic area. We believe that the chemically patterned surfaces could be an alternative strategy to control the flow behavior of water in microfluidic channels.
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