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Remarkable bactericidal traits of a metal-ceramic composite coating elated by hierarchically structured surface

ABSTRACT: Summary A ceramic-based coating with a hierarchical surface structure was synthesized via solid-state reaction enabled by a double cathode glow discharge technique. This innovative coating comprises two distinct layers, specifically an outer layer with a well-aligned micro-pillar array and a dense inner layer. Both are composed of a face-centered cubic Cu(Co,Ni,Fe) solid solution phase together with a spinel-type Fe(Al,Cr)2O4 oxide. This coating exhibits superhydrophobicity and, yet, a very strong adhesion to water, i.e., the so-called “rose petal effect”. This coating also exhibits highly efficient antibacterial ability against both Staphylococcus aureus and Escherichia coli bacteria under both dark and visible light conditions. The excellent antibacterial property originates from the synergistic effects through the release of Cu ions coupled with photothermal activity upon light activation. Graphical abstract Highlights • The coating exhibits a hierarchical surface structure• The coating possesses adhesive superhydrophobicity• The coating shows a strong light harvesting capability over a broad wavelength• The coating offers three distinct pathways for combating the bacterial infection Biomedical Materials; Coatings; Microbiofilms

SUBMITTER: Xu J

PROVIDER: S-EPMC7786122 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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