In this paper, we report the preparation of anisotropic wetting surfaces that could control various wetting behaviors of liquids in a wide surface tension range (from water to oil), which could be employed as a platform for controlling the flow of liquids in microfluidics (MFs). The anisotropic wetting surfaces are chemistry-asymmetric "Janus" silicon cylinder arrays, which are fabricated via selecting and regulating the functional groups on the surface of each cylinder unit. Liquids (in a wide surface tension range) wet in a unidirectional manner along the direction that was modified by the group with large surface energy. Through introducing the Janus structure into a T-shaped pattern and integrating it with an identical T-shaped poly(dimethylsiloxane) microchannel, the as-prepared chips can be utilized to perform as a surface tension admeasuring apparatus or a one-way valve for liquids in a wide surface tension range, even oil. Furthermore, because of the excellent ability in controlling the flowing behavior of liquids in a wide surface tension range in an open system or a microchannel, the anisotropic wetting surfaces are potential candidates to be applied both in open MFs and conventional MFs, which would broaden the application fields of MFs.
Ge, P.,S. L. Wang,Y. S. Liu,et al. Autonomous Control of Fluids in a Wide Surface Tension Range in Microfluidics[J]. Langmuir,2017,33(29).
APA
Ge, P..,S. L. Wang.,Y. S. Liu.,W. D. Liu.,N. A. Z. Yu.,...&J. H. Zhang and B. Yang.(2017).Autonomous Control of Fluids in a Wide Surface Tension Range in Microfluidics.Langmuir,33(29).
MLA
Ge, P.,et al."Autonomous Control of Fluids in a Wide Surface Tension Range in Microfluidics".Langmuir 33.29(2017).
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