Stable superhydrophobic surface via carbon nanotubes coated with a ZnO thin film

L. Huang, Shu Ping Lau, H. Y. Yang, E. S.P. Leong, Siu Fung Yu, S. Prawer

Research output: Journal article publicationJournal articleAcademic researchpeer-review

305 Citations (Scopus)

Abstract

We report the formation of a stable superhydrophobic surface via aligned carbon nanotubes (CNTs) coated with a zinc oxide (ZnO) thin film. The CNT template was synthesized by chemical vapor deposition on an Fe-N catalyst layer. The ZnO film, with a low surface energy, was deposited on the CNT template by the filtered cathodic vacuum arc technique. Contact angle measurement reveals that the surface of the ZnO-coated CNTs is superhydrophobic with water contact angle of 159°. Unlike the uncoated CNTs surface, the ZnO-coated CNTs surface shows no sign of water seepage even after a prolonged period of time. The wettability of the surface can be reversibly changed from superhydrophobicity to hydrophilicity by alternation of ultraviolet (UV) irradiation and dark storage.
Original languageEnglish
Pages (from-to)7746-7748
Number of pages3
JournalJournal of Physical Chemistry B
Volume109
Issue number16
DOIs
Publication statusPublished - 28 Apr 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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