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Biosynthesis of Gold Nanoparticles

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Synthesis of nanoparticles with interesting physico-chemical properties using efficient as well as eco-friendly technology is one of the main objectives of nanotechnology. Biological systems have been reported to synthesize inorganic materials under certain circumstances. Exploiting the biosynthetic potential of different organisms, nanoparticles of varying morphologies and sizes have been synthesized. Among the nanomaterials, gold has received considerable attention owing to its varied applications in the fields of nano-medicine, catalysis, electronics, and optics. This review gives an account on the biosynthesis of gold nanoparticles from microorganisms, plants, and other biological sources, with particular emphasis on the probable mechanisms leading to the formation of gold nanoparticles and the extent of control over nanoparticle properties that has been achieved so far in the biosynthetic protocols. It has been speculated that enzymes and/or proteins secreted by the organisms are involved in the bio-reduction and stabilization of the nanoparticles. The biosynthetic procedures could compete with existing solvent-based chemical synthetic procedures in order to achieve stable and monodisperse gold nanoparticles in large scale.


Document Type: Review Article


Publication date: December 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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