Rapid biosynthesis of gold nanoparticles by Staphylococcus epidermidis: its characterisation and catalytic activity

Srinath, B. S. and Rai, V. R. (2015) Rapid biosynthesis of gold nanoparticles by Staphylococcus epidermidis: its characterisation and catalytic activity. MATERIALS LETTERS, 146. pp. 23-25. ISSN 1873-4979

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Official URL: https://doi.org/10.1016/j.matlet.2015.01.151

Abstract

The biosynthesis of nanoparticles is a cost effective, eco-friendly and non toxic alternative to physical and chemical methods. In the present study, we report a rapid and eco-friendly method for extracellular biosynthesis of gold nanopartides (GNPs) using cell free extract of Staphylococcus epidermidis. In this method, the formation of GNPs is rapid as the reaction process completes within few minutes. The synthesis of GNPs was preliminary observed by colour change from pale yellow to pink red and confirmed by peaks at 545-550 nm using a UV-visible spectroscopy. Transmission electron microscopy (TEM) showed formation of well dispersed GNPs in the range of 20-25 nm. Fourier transform-infrared spectroscopy (FT-IR) was used to characterise the functional groups which might have played an important role in reduction and stabilisation of GNPs. The synthesised GNPs showed good catalytic activity for methylene blue degradation. This is the first to report on the rapid and ecofriendly method for the biosynthesis of GNPs by Staphylococcus epidermidis. (C) 2015 Elsevier B.V. All rights reserved.

Item Type: Article
Subjects: B Life Science > Microbiology
Divisions: Department of > Microbiology
Depositing User: Shrirekha N
Date Deposited: 11 Jun 2019 06:19
Last Modified: 11 Jun 2019 06:19
URI: http://eprints.uni-mysore.ac.in/id/eprint/2738

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