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access icon free Gram + ve bacterium Staphylococcus aureus: a potential source for the green biosynthesis of monodispersed, smaller selenium nanoparticles

In the current communication, an effort has been made to utilise Gram + ve bacterium Staphylococcus aureus, as a potential, renewable source for the green biosynthesis of selenium nanoparticles. The time-dependent bacterial biosynthesis of selenium nanoparticles was studied at different selenite concentrations. The green synthesised nanoparticles were probed with ultraviolet–visible spectra, inductively coupled plasma optical emission spectrometry, transmission electron microscope, X-ray diffraction, zeta potential and Fourier transform infrared spectroscopy characterisation tools. The strain produced red coloured, protein capped, amorphous, nearly monodispersed spherical nanoparticles of 3.6 nm size. This is the first report, in which the smallest selenium nanoparticles with the narrow size distribution of 2.8–4.7 nm were biosynthesised by the bacteria. Thus, paving a way for the commercial production of size-controlled smaller, selenium nanoparticles.

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http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2017.0822
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