Please use this identifier to cite or link to this item: http://hdl.handle.net/10321/2244
Title: Biosynthesis of ZnO nanoparticles using Jacaranda mimosifolia flowers extract: Synergistic antibacterial activity and molecular simulated facet specific adsorption studies
Authors: Sharma, Deepali 
Sabela, Myalowenkosi I. 
Kanchi, Suvardhan 
Mdluli, Phumlane S. 
Singh, Gulshan 
Stenström, Thor-Axel 
Bisetty, Krishna 
Keywords: Biosynthesis;Jacaranda mimosifolia flowers extract;Zinc oxide nanoparticles;Antibacterial activity
Issue Date: 2016
Publisher: Elsevier
Source: Sharma, D. et al. 2016. Biosynthesis of ZnO nanoparticles using Jacaranda mimosifolia flowers extract: Synergistic antibacterial activity and molecular simulated facet specific adsorption studies. Journal of Photochemistry & Photobiology, B: Biology. 162: 199-207.
Abstract: The naturally occurring biomolecules present in the plant extracts have been identified to play an active role in the single step formation of nanoparticles with varied morphologies and sizes which is greener and environmen-tally benign. In the present work, spherical zinc oxide nanoparticles (ZnO NPs) of 2–4 nm size were synthesized using aqueous extract of fallen Jacaranda mimosifolia flowers (JMFs), treated as waste. The microwave assisted synthesis was completed successfully within 5 min. Thereafter, phase identification, morphology and optical band gap of the synthesized ZnO NPs were done using X-ray diffraction (XRD), high resolution transmission elec-tron microscopy (HRTEM) and UV–Visible spectroscopy techniques. The composition of JMFs extract was ana-lyzed by gas chromatography–mass spectrometry (GC–MS) and the ZnO NPs confirmation was further explored with fourier transform infrared spectroscopy (FTIR). The GC–MS results confirmed the presence of oleic acid which has high propensity of acting as a reducing and capping agent. The UV–Visible data suggested an optical band gap of 4.03 eV for ZnO NPs indicating their small size due to quantum confinement. Further, facet specific adsorption of oleic acid on the surface of ZnO NPs was studied computationally to find out the im-pact of biomolecules in defining the shape and size of NPs. The viability of gram negative Escherichia coli and gram positive Enterococcus faecium bacteria was found to be 48% and 43%, respectively at high concentration of NPs.
URI: http://hdl.handle.net/10321/2244
ISSN: 1011-1344 (print)
1873-2682 (online)
Appears in Collections:Research Publications (Applied Sciences)

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