A solid strategy to realize efficient antibacterial activity on the shade surface of bulk silicon under natural or indoor lighting
CHEMICAL ENGINEERING JOURNAL(2024)
Abstract
The dual threat posed by the transmission of surface-adhered pathogens and the rise of antibiotic resistance has emphasized the urgent demand for biosafe, potent, and broad-spectrum antibacterial surfaces. The application of conventional light-driven antibacterial strategies is hampered by the lack of sufficient illumination of the shade surface. To address this issue, a novel efficient antibacterial design satisfying the shade-side surface of bulk silicon continuous antibacterial under natural light, indoor ambient room lighting, or dark and dank environments has been developed by exploring synergistic antibacterial mechanisms. Herein, the p-n junction design is employed as the illuminating surface to efficiently transport the photogenerated holes to the shade-side surface, causing considerable photo-electrical injury to the bacteria, while the optimized nanowire structure fabricated on the shade-side surface by facile methods can simultaneously exacerbate the mechanical rupture of the bac-teria. As a result, the shade-side surface prepared via the facile method exhibited synergistic broad-spectrum antibacterial behavior with 100 % inactivation against multidrug-resistant Klebsiella pneumoniae and multidrug-resistant Enterococcus. It is worth emphasizing that this work provides a promising strategy to endow the shade surface of bulk silicon with efficient antibacterial activity for real applications.
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Key words
Antibacterial shade surface,Nanowire structures,Mechanical rupture,Natural or indoor light,Photo-electrical injury
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