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.
Keywords: silver nanoparticles; Aspergillus terreus; biosynthesis; NADH
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Li, G.; He, D.; Qian, Y.; Guan, B.; Gao, S.; Cui, Y.; Yokoyama, K.; Wang, L. Fungus-Mediated Green Synthesis of Silver Nanoparticles Using Aspergillus terreus. Int. J. Mol. Sci. 2012, 13, 466-476.
Li G, He D, Qian Y, Guan B, Gao S, Cui Y, Yokoyama K, Wang L. Fungus-Mediated Green Synthesis of Silver Nanoparticles Using Aspergillus terreus. International Journal of Molecular Sciences. 2012; 13(1):466-476.
Li, Guangquan; He, Dan; Qian, Yongqing; Guan, Buyuan; Gao, Song; Cui, Yan; Yokoyama, Koji; Wang, Li. 2012. "Fungus-Mediated Green Synthesis of Silver Nanoparticles Using Aspergillus terreus." Int. J. Mol. Sci. 13, no. 1: 466-476.