Macroscopic-wetting anisotropy on the line-patterned surface of fluoroalkylsilane monolayers
Macroscopic-wetting anisotropy on the line-patterned surface of fluoroalkylsilane monolayers
复制标题
DOI：
10.1021/la0485172
复制
发表时间：
2005-02-01
期刊：
影响因子：
3.9
通讯作者：
Takahara, A
中科院分区：
文献类型：
--
作者：
Morita, M;Koga, T;Takahara, A
采用真空紫外（VUV）光刻技术制备了具有亲疏液区（线宽1 ~ 20 μ m）的微图纹氟烷基硅烷单层表面。研究了直径为0.5 ~ 5mm的宏观液滴在微图案表面上的各向异性润湿。氟烷基硅烷/硅醇图案表面的接触角、滑动角和液滴畸变的强各向异性归因于平行线和正交线之间润湿能垒的差异。润湿各向异性随亲液区减小而减小。各组分表面自由能差异不大的氟烷基硅烷/烷基硅烷图案表面仅在低表面张力液体中表现出各向异性润湿。
Micropatterned fluoroalkylsilane monolayer surfaces with liquidphilic/liquidphobic area (line width 1-20 mum) were prepared with few defects by vacuum ultraviolet (VUV) photolithography. The anisotropic wetting of a macroscopic droplet with a 0.5-5 mm diameter on the micropatterned surfaces was investigated. The strong anisotropy of the contact angle and the sliding angle and droplet distortion for fluoroalkylsilane/ silanol patterned surfaces was attributed to the difference in the energy barrier of wetting between parallel and orthogonal lines. The wetting anisotropy decreased with decreases in the liquidphilic area. Fluoroalkylsilane/alkylsilane patterned surfaces with small differences in the surface free energies of the components showed anisotropic wetting only for the low-surface-tension liquids.