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Nanomaterials 2017, 7(1), 7; doi:10.3390/nano7010007

Bulk Surfaces Coated with Triangular Silver Nanoplates: Antibacterial Action Based on Silver Release and Photo-Thermal Effect

1
Department of Chemistry, University of Pavia, Viale Taramelli 12, 27100 Pavia, Italy
2
Department of Physics, University of Pavia, Via Bassi 6, 27100 Pavia, Italy
3
Department of Drug Sciences, University of Pavia, Viale Taramelli 14, 27100 Pavia, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Guogang Ren
Received: 2 November 2016 / Revised: 5 December 2016 / Accepted: 30 December 2016 / Published: 6 January 2017
(This article belongs to the Special Issue Antimicrobial Nanomaterials and Nanotechnology)
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Abstract

A layer of silver nanoplates, specifically synthesized with the desired localized surface plasmon resonance (LSPR) features, was grafted on amino-functionalized bulk glass surfaces to impart a double antibacterial action: (i) the well-known, long-term antibacterial effect based on the release of Ag+; (ii) an “on demand” action which can be switched on by the use of photo-thermal properties of silver nano-objects. Irradiation of these samples with a laser having a wavelength falling into the so called “therapeutic window” of the near infrared region allows the reinforcement, in the timescale of minutes, of the classical antibacterial effect of silver nanoparticles. We demonstrate how using the two actions allows for almost complete elimination of the population of two bacterial strains of representative Gram-positive and Gram-negative bacteria. View Full-Text
Keywords: antibacterial surfaces; silver nanoplates; seed-growth synthesis; photothermal effect; hyperthermia antibacterial surfaces; silver nanoplates; seed-growth synthesis; photothermal effect; hyperthermia
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D’Agostino, A.; Taglietti, A.; Desando, R.; Bini, M.; Patrini, M.; Dacarro, G.; Cucca, L.; Pallavicini, P.; Grisoli, P. Bulk Surfaces Coated with Triangular Silver Nanoplates: Antibacterial Action Based on Silver Release and Photo-Thermal Effect. Nanomaterials 2017, 7, 7.

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