writer：Peng Ge, Shuli Wang, Yongshun Liu, Wendong Liu, Nianzuo Yu, Jianglei Zhang, Huaizhong Shen, Junh
keywords：none
source：期刊
specific source：Langmuir
Issue time：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.