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Type: Artigo de periódico
Title: Synthesis and characterization of silver nanoparticles using water-soluble starch and its antibacterial activity on Staphylococcus aureus
Author: Valencia, GA
Vercik, LCD
Ferrari, R
Vercik, A
Abstract: 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.
Subject: Biosynthesis
Enrofloxacin Antibiotic
Silver nanoparticles
Staphylococcus aureus
Country: Alemanha
Editor: Wiley-v C H Verlag Gmbh
Citation: Starch-starke. Wiley-v C H Verlag Gmbh, v. 65, n. 41984, n. 931, n. 937, 2013.
Rights: fechado
Identifier DOI: 10.1002/star.201200252
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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