Jump to main content
Jump to site search

Issue 3, 2020
Previous Article Next Article

Antibacterial activity of an NIR-induced Zn ion release film

Author affiliations

Abstract

Photothermal therapy originated from using gold nanorods (GNRs) and near-infrared (NIR) irradiation has been widely used in the antibacterial field. Zn element exhibits antimicrobial activity against various bacterial and fungal strains. In this study, a bilayer film, consisting of GNRs as the inner layer and a polydopamine layer containing Zn element (PDA@Zn) as the outer layer, was deposited on the Ti surface. The results testified that all the GNR-modified surfaces had the same photothermal conversion efficiency. The Ti surface modified with GNR and PDA@Zn layers had better antibacterial activity against E. coli and S. aureus due to the GNR-induced photothermal effect and the antibacterial Zn element. Moreover, the accelerated release of Zn ions from the PDA@Zn layer was attributed to the GNR-induced high temperature under the NIR irradiation, which caused the concentration of Zn ions to be high enough to kill the surrounding bacteria. This study illustrates that a composite surface possessing both the contact and heat-responsive antibacterial property was constructed on titanium for potential clinical applications.

Graphical abstract: Antibacterial activity of an NIR-induced Zn ion release film

Back to tab navigation

Supplementary files

Article information


Submitted
13 Oct 2019
Accepted
30 Nov 2019
First published
02 Dec 2019

J. Mater. Chem. B, 2020,8, 406-415
Article type
Paper

Antibacterial activity of an NIR-induced Zn ion release film

T. Yang, D. Wang and X. Liu, J. Mater. Chem. B, 2020, 8, 406
DOI: 10.1039/C9TB02258A

Social activity

Search articles by author

Spotlight

Advertisements