Chang Chi-Jung, Hung Shao-Tsu
Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung, Taiwan 40724, Republic of China.
J Nanosci Nanotechnol. 2010 Jul;10(7):4674-8. doi: 10.1166/jnn.2010.1691.
By controlling the surface nanostructure, the wettability of films with similar pore-array microstructure can be tuned from hydrophilic to nearly superhydrophobic without variation of the chemical composition. PA1 pore-array film consisting of the horizontal ZnO nanosheets was nearly superhydrophobic. PA2 pore-array film consisting of growth-hindered vertically-aligned ZnO nanorods was hydrophilic. The influences of the nanostructure shape, orientation and the micropore size on the contact angle of the PA1 films were studied. This study provides a new approach to control the wettability of films with similar pore-array structure at the micro-scale by changing their surface nanostructure. PA1 films exhibited irradiation induced reversible wettability transition. The feasibility of creating a wetted radial pattern by selective UV irradiation of PA1 film through a mask with radial pattern and water vapor condensation was also evaluated.
通过控制表面纳米结构，具有相似孔阵列微观结构的薄膜的润湿性可以在化学成分不变的情况下，从亲水性调整到接近超疏水性。由水平排列的ZnO纳米片组成的PA1孔阵列薄膜接近超疏水性。由生长受阻的垂直排列的ZnO纳米棒组成的PA2孔阵列薄膜是亲水性的。研究了纳米结构形状、取向和微孔尺寸对PA1薄膜接触角的影响。本研究提供了一种通过改变具有相似孔阵列结构的薄膜的表面纳米结构来在微观尺度上控制其润湿性的新方法。PA1薄膜表现出辐照诱导的可逆润湿性转变。还评估了通过带有径向图案的掩膜对PA1薄膜进行选择性紫外辐照和水蒸气冷凝来创建湿润径向图案的可行性。
