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  • Cruces_ANM_Bimetallic NP_preprint

    Rights statement: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Nano Material, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsanm.1c04031

    Accepted author manuscript, 1.56 MB, PDF document

    Embargo ends: 3/01/23

    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

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Copper/Silver Bimetallic Nanoparticles Supported on Aluminosilicate Geomaterials as Antibacterial Agents

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published
  • E. Cruces
  • N. Arancibia-Miranda
  • K. Manquián-Cerda
  • F. Perreault
  • N. Bolan
  • M.I. Azócar
  • V. Cubillos
  • J. Montory
  • M.A. Rubio
  • B. Sarkar
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<mark>Journal publication date</mark>31/01/2022
<mark>Journal</mark>ACS Applied Nano Materials
Issue number1
Volume5
Number of pages12
Pages (from-to)1472-1483
Publication StatusPublished
Early online date3/01/22
<mark>Original language</mark>English

Abstract

This study aims to understand how properties of modified aluminosilicate geomaterials influence the antibacterial performance of nanocomposites when prepared with bimetallic nanoparticles (NPs). Copper/silver (Cu/Ag) bimetallic NPs were synthesized in the presence of imogolite (Imo), montmorillonite (Mtt), or zeolite (Zeo) using a simple one-pot method and characterized for their crystal phases, micro- and nanomorphologies, particle size, elemental composition, and electrophoretic mobility. The antibacterial activity was evaluated through minimum inhibition concentration assays of NPs and nanocomposites for Gram (-) Escherichia coli and Gram (+) Staphylococcus aureus bacteria. Deposition of metallic Cu0, Ag0, and cuprite NPs was confirmed in Zeo_Cu/Ag and Imo_Cu/Ag nanocomposites, whereas only Cu0 and Ag0 were identified in Mtt_Cu/Ag. The bimetallic NPs were more uniformly distributed on Zeo and Mtt than Imo. Particle sizes of 28.1 ± 5.0, 9.4 ± 2.3, 10.1 ± 1.7, and 12 ± 1.3 nm were determined for Cu/Ag NPs, Imo_Cu/Ag, Mtt_Cu/Ag, and Zeo_Cu/Ag, respectively. The release rate of Cu and Ag ions from Zeo_Cu/Ag was higher than those of pristine Cu/Ag NPs and the other two nanocomposites. The antimicrobial action of bimetallic NPs and nanocomposites was dose-dependent in relation to the concentration of concerned materials and their stability in the medium. The physicochemical characteristics of Zeo resulted in a homogeneous distribution and low oxidation and agglomeration of Cu/Ag NPs, consequently increasing the antibacterial activity. Results of this study highlight the benefits of using a geomaterial support to achieve high antibacterial activity of bimetallic NPs, which could help reduce the consumption of pure Cu/Ag salts in NP-based antibacterial applications.

Bibliographic note

This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Nano Material, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acsanm.1c04031