Fungus-Mediated Green Synthesis of Silver Nanoparticles Using Aspergillus terreus |
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Authors: | Li Guangquan He Dan Qian Yongqing Guan Buyuan Gao Song Cui Yan Yokoyama Koji Wang Li |
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Affiliation: | Department of Pathogenobiology, Norman Bethune College of Medicine, Jilin University Mycology Research Center, Jilin University, Changchun 130021, China; E-Mails: guangquanli83@gmail.com (G.L.); hedan@jlu.edu.cn (D.H.); qianyq09@mails.jlu.edu.cn (Y.Q.); songgao850118@gmail.com (S.G.); cuiyan923@hotmail.com (Y.C.). |
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Abstract: | 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. |
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Keywords: | silver nanoparticles Aspergillus terreus biosynthesis NADH |
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