Antifouling properties of zinc oxide nanorod coatings

Marwan Al-Fori, Sergey Dobretsov, Myo Tay Zar Myint, Joydeep Dutta

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

In laboratory experiments, the antifouling (AF) properties of zinc oxide (ZnO) nanorod coatings were investigated using the marine bacterium Acinetobacter sp. AZ4C, larvae of the bryozoan Bugula neritina and the microalga Tetraselmis sp. ZnO nanorod coatings were fabricated on microscope glass substrata by a simple hydrothermal technique using two different molar concentrations (5 and 10 mM) of zinc precursors. These coatings were tested for 5 h under artificial sunlight (1060 W m-2 or 530 W m-2) and in the dark (no irradiation). In the presence of light, both the ZnO nanorod coatings significantly reduced the density of Acinetobacter sp. AZ4C and Tetraselmis sp. in comparison to the control (microscope glass substratum without a ZnO coating). High mortality and low settlement of B. neritina larvae was observed on ZnO nanorod coatings subjected to light irradiation. In darkness, neither mortality nor enhanced settlement of larvae was observed. Larvae of B. neritina were not affected by Zn2+ ions. The AF effect of the ZnO nanorod coatings was thus attributed to the reactive oxygen species (ROS) produced by photocatalysis. It was concluded that ZnO nanorod coatings effectively prevented marine micro and macrofouling in static conditions.

Original languageEnglish
Pages (from-to)871-882
Number of pages12
JournalBiofouling
Volume30
Issue number7
DOIs
Publication statusPublished - 2014

Keywords

  • antifouling
  • bacteria
  • bryozoa
  • nanotechnology
  • photocatalysis
  • zinc oxide

ASJC Scopus subject areas

  • Aquatic Science
  • Water Science and Technology
  • Applied Microbiology and Biotechnology
  • Medicine(all)

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