| Summary: | The ability of prokaryotic microorganisms to
reduce the inorganic metals has opened up an exciting
eco‐friendly approach towards the development of
natural ‘nano‐factories’. However, a number of issues
have to be addressed from the nanotechnological and
microbiological point of view before such a biosynthesis
approach can compete with the existing physical and
chemical methods. This report investigates the synthesis
of silver oxide nanoparticles using Lactobacillus
mindensis, isolated using fixer solution from an X‐ray
photographic laboratory. Nanoparticles obtained were
characterized by means of UV‐vis spectroscopy,
transmission electron microscopy (TEM), and X‐ray
diffraction (XRD). The UV‐vis spectrum shows the
absorbance maximum at 430 nm, which is a
characteristic of surface plasmon resonance of silver.
Further, the presence of stable nanoparticles in the
range of 2‐20 nm was determined using TEM analysis.
Silver nanoparticles in the form of silver oxide were
confirmed in the XRD study. In conclusion, Lactobacillus
mindensis serves as a promising candidate in the quest to
synthesize silver oxide nanoparticles through green
chemistry.
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