Issue 30, 2015

Two-dimensional antibacterial Pd@Ag nanosheets with a synergetic effect of plasmonic heating and Ag+ release

Abstract

In this work, a novel bactericidal agent based on two-dimensional Pd@Ag nanosheets (Pd@Ag NSs) that is responsive to near-infrared (NIR) light has been developed. These Pd@Ag NSs were prepared by reducing silver ions on the surface of Pd nanosheets (Pd NSs) seeds by formaldehyde, and displayed excellent NIR absorption and photothermal conversion properties. In addition, the NIR irradiation triggers the release of more Ag+ from the Pd@Ag NSs. Upon exposure to a NIR laser at a low power density (0.5 W cm−2), Pd@Ag NSs kill both Gram-negative (Escherichia coli, E. coli) and Gram-positive (Staphylococcus aureus, S. aureus) bacteria effectively by the synergistic effect of plasmonic heating and Ag+ release, which is much higher than either plasmonic heating or Ag+ alone. Such a novel nanomaterial is promising as an adjuvant therapeutic method for the treatment of patients suffering from severe bacterial infections.

Graphical abstract: Two-dimensional antibacterial Pd@Ag nanosheets with a synergetic effect of plasmonic heating and Ag+ release

Supplementary files

Article information

Article type
Paper
Submitted
05 May 2015
Accepted
22 Jun 2015
First published
23 Jun 2015

J. Mater. Chem. B, 2015,3, 6255-6260

Author version available

Two-dimensional antibacterial Pd@Ag nanosheets with a synergetic effect of plasmonic heating and Ag+ release

S. Mo, X. Chen, M. Chen, C. He, Y. Lu and N. Zheng, J. Mater. Chem. B, 2015, 3, 6255 DOI: 10.1039/C5TB00830A

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