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Title of Journal: Bioprocess Biosyst Eng

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Abbravation: Bioprocess and Biosystems Engineering

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Springer-Verlag

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DOI

10.1002/bdm.486

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1615-7605

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Green synthesis of gold nanoparticles using Empha

Authors: Ratul Kumar Das Nayanmoni Gogoi Utpal Bora
Publish Date: 2011/01/13
Volume: 34, Issue: 5, Pages: 615-619
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Abstract

The present study explores the reducing and capping potentials of ethanolic flower extract of the plant Nyctanthes arbortristis for the synthesis of gold nanoparticles The extract at different volume fractions were stirred with HAuCl4 aqueous solution at 80 °C for 30 min The UV–Vis spectroscopic analysis of the reaction products confirmed successful reduction of Au3+ ions to gold nanoparticles Transmission electron microscope TEM revealed dominant spherical morphology of the gold nanoparticles with an average diameter of 198 ± 50 nm Xray diffraction XRD study confirmed crystalline nature of the synthesized particles Fourier transform infrared FTIR and nuclear magnetic resonance NMR analysis of the purified and lyophilized gold nanoparticles confirmed the surface adsorption of biomolecules during preparation and caused longterm 6 months stability Low reaction temperature 25 °C favored anisotropy The strong reducing power of the flower extract can also be tested in the green synthesis of other metallic nanoparticlesThis work was accomplished with the funds provided by Department of Science and Technology DST Government of India NG thanks MHRD for the research fellowship We are also thankful to Prof SK Borthakur Department of Botany Guwahati University Guwahati Assam India for helping us in identification of the flower used in the present study

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