Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/79742
Type: Artigo de periódico
Title: Eco-friendly decoration of graphene oxide with biogenic silver nanoparticles: antibacterial and antibiofilm activity
Author: de Faria, AF
de Moraes, ACM
Marcato, PD
Martinez, DST
Duran, N
Souza, AG
Brandelli, A
Alves, OL
Abstract: This work reports on preparation, characterization, and antibacterial activity of graphene oxide (GO) decorated with biogenic silver nanoparticles (Bio-AgNPs) produced by the fungus Fusarium oxysporum. This nanocomposite (Bio-GOAg) was prepared by an ex situ process through the physical mixture of a GO dispersion with the previously prepared Bio-AgNPs. The adsorption of the Bio-AgNPs onto the GO sheets was confirmed by transmission electron microscopy. The average size of the Bio-AgNPs anchored onto the GO surface was found to be 3.5 nm. The antibacterial activity of the Bio-GOAg nanocomposite against Gram-positive and Gram-negative microorganisms was investigated and a very promising result was found for the Gram-negative strains. In addition, the Bio-GOAg nanocomposite displayed a very strong biocidal activity against the Salmonella typhimurium strain at a concentration of 2.0 mu g/mL. The antibiofilm activity toward S. typhimurium adhered on stainless steel surfaces was also investigated. The results showed 100 % inhibition of the adhered cells after exposure to the Bio-GOAg nanocomposite for 1 h.
Subject: Graphene oxide
Biogenic silver nanoparticles
Fusarium oxysporum
Antibacterial activity
Salmonella typhimurium
Microbiology
Country: Holanda
Editor: Springer
Rights: fechado
Identifier DOI: 10.1007/s11051-013-2110-7
Date Issue: 2014
Appears in Collections:Unicamp - Artigos e Outros Documentos

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