Fungus-mediated green synthesis of silver nanoparticles using Aspergillus terreus

The biosynthesis of nanoparticles has received increasing attention due to the growing need to develop safe, cost-effective and environmentally friendly technologies for nano-materials synthesis. In this report, silver nanoparticles (AgNPs) were synthesized using a reduction of aqueous Ag(+) ion wit...

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Bibliographic Details
Published in:International journal of molecular sciences 2012-01, Vol.13 (1), p.466-476
Main Authors: Li, Guangquan, He, Dan, Qian, Yongqing, Guan, Buyuan, Gao, Song, Cui, Yan, Yokoyama, Koji, Wang, Li
Format: Article
Language:English
Subjects:
Anti-Infective Agents - chemistry
Anti-Infective Agents - metabolism
Anti-Infective Agents - pharmacology
Antimicrobial agents
Aspergillus - metabolism
Aspergillus terreus
Bacteria
Bacteria - drug effects
Biomass
Biosynthesis
Fungi
Fungi - drug effects
Green Chemistry Technology
Metal Nanoparticles - chemistry
Metal Nanoparticles - toxicity
NAD - chemistry
Nanoparticles
Particle Size
Silver
Silver - chemistry
Transmission electron microscopy
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Summary:The biosynthesis of nanoparticles has received increasing attention due to the growing need to develop safe, cost-effective and environmentally friendly technologies for nano-materials synthesis. In this report, silver nanoparticles (AgNPs) were synthesized using a reduction of aqueous Ag(+) ion with the culture supernatants of Aspergillus terreus. The reaction occurred at ambient temperature and in a few hours. The bioreduction of AgNPs was monitored by ultraviolet-visible spectroscopy, and the AgNPs obtained were characterized by transmission electron microscopy and X-ray diffraction. The synthesized AgNPs were polydispersed spherical particles ranging in size from 1 to 20 nm and stabilized in the solution. Reduced nicotinamide adenine dinucleotide (NADH) was found to be an important reducing agent for the biosynthesis, and the formation of AgNPs might be an enzyme-mediated extracellular reaction process. Furthermore, the antimicrobial potential of AgNPs was systematically evaluated. The synthesized AgNPs could efficiently inhibit various pathogenic organisms, including bacteria and fungi. The current research opens a new avenue for the green synthesis of nano-materials.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms13010466