Biosynthesis of Silver Nanoparticles by <Emphasis Type="Italic">Geotricum</Emphasis> sp. |
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Authors: | Ali Jebali Fatemeh Ramezani Bahram Kazemi |
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Institution: | (1) Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran; |
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Abstract: | Nanoparticles are usually 1–100 nm in each spatial dimension considered as building blocks of the next generation of optoelectronics,
electronics, and various chemical and biochemical sensors. In the synthesis of nanoparticles use of microorganisms emerges
as an eco-friendly and exciting approach that reduce waste products (ultimately leading to atomically precise molecular manufacturing
with zero waste); the use of nanomaterials as catalysts for greater efficiency in current manufacturing processes by minimizing
or eliminating the use of toxic materials (green chemistry principles); the use of nanomaterials and nanodevices to reduce
pollution (e.g. water and air filters); and the use of nanomaterials for more efficient alternative energy production (e.g.
solar and fuel cells). Fungi have many advantages for nanoparticle synthesis compared with other organisms. In this study,
Geotricum sp. found to successfully produce Ag nanoparticles. Geotricum sp. was grown in SDA (Sabro Dextrose Agar) medium at 25 ± 1 °C for 96 h. The mycelia were used to convert silver nitrate
solution into nano-silver. Silver nanoparticles were synthesized using these fungi (Geotricum sp.) extracellularly. UV–VIS spectroscopy, Atomic Force Microscopy (AFM) and Scanning Electron Microscopy images shows the
nanoparticle formation in the medium. Energy-dispersive X-ray spectroscopy (EDX) also confirmed that silver nanoparticles
in the range of 30–50 nm were synthesized extracellularly. FTIR analyses confirmed the presence of amide (I) and (II) bands
of protein as capping and stabilizing agent on the surface of nanoparticles. |
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