Wettability control of a transparent substrate using ZnO nanorods

Jae Hoon Choi, Xueqiu You, Jong Hyeon Chang, Byeong Kwon Ju, James Jungho Pak

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


This paper presents a simple way of controlling the wettability of a structured surface with ZnO nanorods on a transparent substrate. A combination of ZnO nanostructures and stearic acid was used to create superhydrophobic surfaces with the potential properties of being self-cleaning, waterproof, and antifog. ZnO nanorods were uniformly covered on glass substrates through a simple hydrothermal method with varying growth time which affects the surface morphology. When a substrate is dipped into 10 mM stearic acid in ethanol for 24 h, chemisorption of the stearic acid takes place on the ZnO nanorod surface, after which the hydrophilic ZnO nanorod surfaces are modified into hydrophobic ones. The contact angle of a water droplet on this superhydrophobic ZnO nanorod surface increased from 110° to 150 I depending on the growth time (from 3 to 6 h) with a high transparency of above 60%. In addition, the water contact angle can be made to as low as 27° after exposing the substrate to 10-mW/cm 2 UV for 1 h.

Original languageEnglish
Pages (from-to)5944-5948
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Issue number7
Publication statusPublished - 2011 Jul


  • Hydrophilic
  • Superhydrophobic
  • Transparent
  • Wettability ZnO Nanorods

ASJC Scopus subject areas

  • Bioengineering
  • General Chemistry
  • Biomedical Engineering
  • General Materials Science
  • Condensed Matter Physics


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