纳米结构ZnO薄膜的制备及其疏水特性

Preparation of Diverse Nanostructured ZnO Films and Their Hydrophobic Properties

利用水热法制备出与透明导电衬底附着良好的多种纳米结构ZnO薄膜,包括纳米柱阵列、纳米管阵列、纳米片阵列等,方便集成在多种器件上.并且实现了阵列中纳米柱、纳米管外径的调节,柱外径在50～300 nm范围内可调,管外径在300～1 000nm范围内可调.几种纳米薄膜均显示出较强的疏水性.在未经任何低表面能物质修饰的情况下,水在外径约300 nm的管状阵列表面的静态接触角已达138°.而在紫外光照射下,这些疏水的ZnO薄膜还可以变得亲水.这些研究结果为ZnO纳米阵列在相关方面的应用提供了重要依据.

ZnO films with diverse nanostructures, including nanorod array, nanotube array, and nanosheet array were prepared. Diameter of the nanorods and nanotubes can be tuned from 50 nm to 300 nm, and from 300 nm to 1 μm, respectively. All the ZnO nanofilms are hydrophobic. The largest contact angle 138° can be achieved without any surface modification. Moreover, the hydrophobic ZnO surface turns to hydrophilic under ultraviolet irradiation. These results provide an important basis for applying ZnO nano-arrays in the relevant aspects.