Issue 45, 2021

Marrying luminescent Au nanoclusters to TiO2 for visible-light-driven antibacterial application

Abstract

Long-lasting yet visible-light-driven bacterial inhibition is highly desired for environmental protection and public health maintenance. However, conventional semiconductors such as titanium dioxide (TiO2) are impotent for such antibacterial application due to their low utilization rate for visible light. Herein we report the design of a long-lasting yet visible-light-driven antibacterial agent based on marrying luminescent Au nanoclusters (Au NCs for short) to TiO2 (TiO2-NH2@Au NCs). The as-obtained TiO2-NH2@Au NC antibacterial agent not only possesses superior utilization for visible light due to the participation of Au NCs as a good photosensitizer, but also has excellent separation efficacy of photogenerated carriers, thereby efficiently enhancing the generation of reactive oxygen species (ROS) for killing bacteria. Consequently, the TiO2-NH2@Au NCs display excellent antibacterial activity with good durability against both Gram-positive and Gram-negative bacteria such as Staphylococcus aureus (99.37%) and Escherichia coli (99.92%) under visible-light irradiation (λ ≥ 400 nm). This study is interesting because it provides a paradigm change in the design of long-lasting yet visible-light-driven NC-based antibacterial agents for diversified bactericidal applications.

Graphical abstract: Marrying luminescent Au nanoclusters to TiO2 for visible-light-driven antibacterial application

Supplementary files

Article information

Article type
Paper
Submitted
21 Aug. 2021
Accepted
13 Okt. 2021
First published
14 Okt. 2021

Nanoscale, 2021,13, 18996-19003

Marrying luminescent Au nanoclusters to TiO2 for visible-light-driven antibacterial application

H. Zhu, N. Liu, Z. Wang, Q. Xue, Q. Wang, X. Wang, Y. Liu, Z. Yin and X. Yuan, Nanoscale, 2021, 13, 18996 DOI: 10.1039/D1NR05503H

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