J. Mater. Sci. Technol. ›› 2020, Vol. 48: 1-8.DOI: 10.1016/j.jmst.2019.10.040

• Research Article •     Next Articles

Superhydrophobic diamond-coated Si nanowires for application of anti-biofouling’

Wenjing Longa,b, Haining Lia,b, Bing Yanga,*(), Nan Huanga, Lusheng Liua, Zhigang Gaic, Xin Jianga,*()   

  1. a Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
    b Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
    c Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Shandong Provincial Key Laboratory of Marine Monitoring Instrument Equipment Technology, National Engineering and Technological Research Center of Marine Monitoring Equipment, Qingdao, 266100, China
  • Received:2019-08-14 Accepted:2019-10-24 Published:2020-07-01 Online:2020-07-13
  • Contact: Bing Yang,Xin Jiang

Abstract:

The effect of the surface wettability of plasma-modified vertical Si nanowire array on the bio-fouling performance has been investigated. The Si nanowires prepared by a metal-assisted chemical etching technique exhibit a super-hydrophilic surface. The treatment in CH4/H2 gas plasma environment leads to the decoration of graphite and diamond nanoparticles around Si nanowires. The detailed interface between graphite/diamond and Si nanowire was characterized by HRTEM technique. These surface-modified nanowire samples show an increased water contact angle with ultrananocrystalline diamond decorated ones being superhydrophobic. The immersion test in chlorella solution reveals that the diamond-coated Si nanowires possess the least attachment of chlorella in comparison with other Si nanowires. This result confirms that the coating of Si nanowires with diamond nanoparticles shows the best behavior in anti-biofouling. Importantly, this work provides a method fabricated super-hydrophobic surface for the application of biofouling prevention.

Key words: Silicon nanowires, Plasma treatment, Super-hydrophobic, Diamond