Chemical Journal of Chinese Universities ›› 2016, Vol. 37 ›› Issue (10): 1882-1890.doi: 10.7503/cjcu20160198

• Physical Chemistry • Previous Articles     Next Articles

Fabrication of Transparent Superhydrophobic Nano-arrays and Self-ejecting Behavior of Dew Drops

ZHANG Youfa*(), AN Lijia, HAO Jianxia, YU Xinquan, CHEN Feng   

  1. Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
  • Received:2016-03-30 Online:2016-10-10 Published:2016-09-18
  • Contact: ZHANG Youfa E-mail:yfzhang@seu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.51671055, 51676033), the Natural Science Foundation of Jiangsu Province, China(No.BK20151135), the Six Talent Peaks of Jiangsu Province, China(No.2015-JNHB-005) and the Jiangsu Key Laboratory of Advanced Metallic Materials, China(No.BM2007204)

Abstract:

Highly-oriented ZnO nanorod arrays on FTO were fabricated by chemical oxidation of ZnO seed layer deposited by a sol-gel method. We studied the influence and its mechanism of solution concentration for crystal seed layer and thereafter growth time for nanorods on the morphology of nano-arrays, and then further explained the change of wettability and transparency. By precisely controlling the fabrication of the nano-arrays, we obtained a superhydrophobic surface with 95% of average transmittance. Owing to densely growth of nanorod arrays, the surface was mainly covered by micro-drops with the diameter of ca.10 μm under steady condensation. Moreover, the tiny dew drops could self-eject during coalescence together and then easily detach from the surface. The measured results of number density, coverage and average diameter of the drops therefore kept constant, showing excellent performance of anti-condensation.

Key words: Nano-arrays, ZnO, Superhydrophobicity, Transparency, Self-ejection

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