Abstract
Nanocrystals of PbS were synthesized by using Aspergillus sp. isolated from the rhizosphere of Chickpea. For this, PbS-tolerant fungi were isolated from the rhizosphere soil by serial dilution method and plated on potato dextrose agar supplemented with 1 mM lead acetate and 0.1 % sodium sulfide. PbS-tolerant fungus was identified as Aspergillus sp. by fluorescence microscopy. The PbS nanocrystals were characterized by UV-visible absorption spectroscopy, x-ray diffraction (XRD), particle size analyzer (PSA), and transmission electron microscope (TEM). UV-visible absorption scan revealed a peak at 300 nm, a characteristic of the nanosize range. Characteristic peaks at around 26° and 30° were observed in XRD analysis of samples of fungal fabricated quantum dots. Crystallite size as determined from transmission electron microscopy was found to be in the range of 10–15 nm.
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The authors gratefully acknowledge Sophisticated Advanced Instrument Facility, All India Institute of Medical Sciences, New Delhi for TEM characterization, and the Department of Science and Technology, New Delhi for providing the financial support for carrying out the present work.
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Kaur, P., Jain, P., Kumar, A. et al. Biogenesis of PbS Nanocrystals by Using Rhizosphere Fungus i.e., Aspergillus sp. Isolated from the Rhizosphere of Chickpea. BioNanoSci. 4, 189–194 (2014). https://doi.org/10.1007/s12668-014-0135-8
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DOI: https://doi.org/10.1007/s12668-014-0135-8