Autonomous Control of Fluids in A Wide Surface Tension Range in Microfluidics.
作者：Peng Ge, Shuli Wang, Yongshun Liu, Wendong Liu, Nianzuo Yu, Jianglei Zhang, Huaizhong Shen, Junh
關(guān)鍵字：none
論文來(lái)源：期刊
具體來(lái)源：Langmuir
發(fā)表時(shí)間：2017年
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
?ow of liquids in micro?uidics (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 modi?ed 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 ?owing 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 ?elds of MFs.