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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Synthesis and characterization of silver nanoparticles using water-soluble starch and its antibacterial activity on Staphylococcus aureus

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Autor(es):
Valencia, German Ayala [1] ; de Oliveira Vercik, Luci Cristina [1] ; Ferrari, Rosana [2, 3] ; Vercik, Andres [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Basic Sci Dept ZAB FZEA, BR-13635000 Pirassununga, SP - Brazil
[2] Inst Santa Cruz, Dept Biol Sci, Ilheus - Brazil
[3] Univ Campinas UNICAMP, Inst Biol, Dept Histol & Embriol, Campinas, SP - Brazil
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: STARCH-STÄRKE; v. 65, n. 11-12, p. 931-937, NOV 2013.
Citações Web of Science: 18
Resumo

The eco-friendly biosynthesis of silver nanoparticles (AgNPs), using starch as reducing agent, was addressed in this work. Starch solutions with three different concentrations (0.5, 1.0, and 1.5%w/v), heated at 90 degrees C for 12h and stabilized with 100 mu L of NaOH 0.1M were used during the synthesis process. AgNPs were characterized by UV-visible (UV-Vis) spectrophotometry, SEM equipped with energy dispersive spectrometer and TEM. The antibacterial activity of the AgNPs was evaluated on Staphylococcus aureus using the disc diffusion technique (Kirby-Bauer method) relative to enrofloxacin antibiotic. Solutions containing AgNPs developed a yellow color and presented UV-Vis spectra characteristic for AgNPs, with surface plasmon resonance peaks between 411 and 414nm. Spherical-shape AgNPs were observed by TEM with sizes between 10 and 30nm. These silver nanoparticles displayed an antimicrobial activity against S. aureus in colloidal state and films. (AU)

Processo FAPESP: 10/50424-3 - Desenvolvimento e caracterização de filmes nanoestruturados para biossensores condutimetricos de peróxido de hidrogênio
Beneficiário:Andrés Vercik
Linha de fomento: Auxílio à Pesquisa - Regular