Electrodeposition for antibacterial nickel-oxide-based coatings

Yan Yan Xi, Bing Qiang Huang, Aleksandra B. Djurišić, Charis M.N. Chan, Frederick C.C. Leung, Wai Kin Chan, Doris T.W. Au

    Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

    13 Citations (Scopus)

    Abstract

    Nickel-oxide-based films exhibiting antibacterial activity against both Gram-negative (Escherichia coli) and Gram-positive bacteria (Bacillus atrophaeus) have been fabricated by electrodeposition from aqueous solutions. However, after annealing of the films, no antibacterial activity has been observed. As-deposited films were found to consist of a mixture of nickel-oxide hydroxide and nickel hydroxide, while annealing resulted in the conversion of the films into pure NiO. Also, annealed films exhibited no production of H2O2, unlike as-deposited films. Thus, antibacterial activity of as-deposited films is related to the presence of nickel-oxide hydroxide/nickel hydroxide which results in the production of reactive oxygen species and antibacterial activity. © 2009 Elsevier B.V. All rights reserved.
    Original languageEnglish
    Pages (from-to)6527-6530
    JournalThin Solid Films
    Volume517
    Issue number24
    DOIs
    Publication statusPublished - 30 Oct 2009

    Research Keywords

    • Bactericidal coatings
    • Electrodeposition
    • Oxides
    • Scanning electron microscopy
    • X-ray diffraction

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