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Citation: ZHOU Si-Si, GUAN Zi-Sheng, LI Qiang, LU Chun-Hua, XU Zhong-Zi. Fabrication of Superhydrophobic ZnO Surfaces via Zn Foil Hydrothermal Reactions and Fluoroalkylsilane Modified Process[J]. Acta Physico-Chimica Sinica, ;2009, 25(08): 1593-1598. doi: 10.3866/PKU.WHXB20090755 shu

Fabrication of Superhydrophobic ZnO Surfaces via Zn Foil Hydrothermal Reactions and Fluoroalkylsilane Modified Process

1.
College of Materials Science and Technology, Nanjing University of Technology, Nanjing 210009, P. R. China

Received Date: 20 January 2009
Available Online: 1 June 2009

Cake-like, lotus leaf-like, trunk-like, and cactus-like ZnO surfaces grown directly on zinc substrates were fabricated by Zn foil hydrothermal reactions in an ethylenediamine solution at 120, 140, and 160 ℃. Scanning electron microscopy indicated that the micro-/submicro complex structures were more regular at longer reaction time and higher reaction temperature. The hydrophobicity of typical structured ZnO surfaces modified with a layer of fluoroalkylsilane were measured. Results showed that the structured surfaces prepared at 140 ℃ for 4 h as well as at 160 ℃ for 5 h exhibited superhydrophobicity with water contact angles of 154.6° and 157.3° as well as sliding angles of about 5°and 3°, respectively. This method may be used to fabricate various microstructured ZnO surfaces showing superhydrophobicity at a low cost.
- Hydrothermal reaction,
- Superhydrophobicity,
- Zinc oxide,
- Zn foil,
- Fluoroalkylsilane modification
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