Issue 3, 2020

Safer-by-design biocides made of tri-thiol bridged silver nanoparticle assemblies

Abstract

Silver nanoparticles (AgNPs) are efficient biocides increasingly used in consumer products and medical devices. Their activity is due to their capacity to release bioavailable Ag(I) ions making them long-lasting biocides but AgNPs themselves are usually easily released from the product. Besides, AgNPs are highly sensitive to various chemical environments that triggers their transformation, decreasing their activity. Altogether, widespread use of AgNPs leads to bacterial resistance and safety concerns for humans and the environment. There is thus a crucial need for improvement. Herein, a proof of concept for a novel biocide based on AgNP assemblies bridged together by a tri-thiol bioinspired ligand is presented. The final nanomaterial is stable and less sensitive to chemical environments with AgNPs completely covered by organic molecules tightly bound via their thiol functions. Therefore, these AgNP assemblies can be considered as safer-by-design and innovative biocides, since they deliver a sufficient amount of Ag(I) for biocidal activity with no release of AgNPs, which are insensitive to transformations in the nanomaterial.

Graphical abstract: Safer-by-design biocides made of tri-thiol bridged silver nanoparticle assemblies

Supplementary files

Article information

Article type
Communication
Submitted
01 5月 2019
Accepted
14 8月 2019
First published
11 11月 2019
This article is Open Access
Creative Commons BY license

Nanoscale Horiz., 2020,5, 507-513

Safer-by-design biocides made of tri-thiol bridged silver nanoparticle assemblies

M. Marchioni, G. Veronesi, I. Worms, W. L. Ling, T. Gallon, D. Leonard, C. Gateau, M. Chevallet, P. Jouneau, L. Carlini, C. Battocchio, P. Delangle, I. Michaud-Soret and A. Deniaud, Nanoscale Horiz., 2020, 5, 507 DOI: 10.1039/C9NH00286C

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