How did the structural ZnO nanowire as antibacterial coatings control the switchable wettability

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Infectious bacterial biofilms represent a threat to public health, industry and economy. They are also considered as harmful organisms for marine animals, water systems, and food processing industry. In this paper, a method of rapidly growing antibacterial ZnO nanowire coatings on a variety of substrates using a fibre laser was demonstrated. Pure well ordered, hexagonal Wurtzite ZnO nanowires of around 90 nm diameter and 1.7 µm in length were successfully formed on a stainless steel, Cu, ITO coated glass and FTO coated glass substrates using a laser-induced hydrothermal process. The coating has been found to be rapidly switchable between being superhydrophobic and superhydrophilic with UV light irradiation. The findings show that long-term (e.g. 4 months) antibacterial properties against Escherichia coli (E. coli) bacteria under standard laboratory light and dark conditions were achieved. A micro/nanoflower-like structure was also produced by tuning the pH value of the used aqueous solution. The flower-like structure also showed high antibacterial activities.

Bibliographical metadata

Original languageEnglish
Pages (from-to)593-606
Number of pages14
JournalApplied Surface Science
Early online date30 Oct 2018
Publication statusPublished - 1 Mar 2019

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