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Spectrochim Acta A Mol Biomol Spectrosc. 2015 Mar 15;139:7-12. doi: 10.1016/j.saa.2014.11.079. Epub 2014 Dec 1.

Microwave-assisted synthesis of CdO-ZnO nanocomposite and its antibacterial activity against human pathogens.

Author information

1
School of Physics, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India.
2
School of Physics, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India. Electronic address: dhanus2k3@yahoo.com.
3
Department of Biotechnology and Genetic Engineering, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India.

Abstract

CdO-ZnO nanocomposite was prepared by microwave-assisted method and characterized by X-ray crystallography (XRD), Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FT-IR). It exhibits hexagonal cubic structure with an average crystallite size of 27 nm. From the UV-Vis spectra, the bandgap is estimated as 2.92 eV. The fluorescence spectrum shows a near band edge emission at 422 nm. In addition the antibacterial activity of CdO-ZnO nanocomposite was carried out in-vitro against two kinds of bacteria: gram negative bacteria (G -ve) i.e. Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae and gram positive bacteria (G +ve): Staphylococcus aureus, Proteus vulgaris and Bacillus spp. This study indicates the zone of inhibition of 40 mm has high antibacterial activity towards the gram positive bacterium S. aureus.

KEYWORDS:

Antibacterial activity; CdO–ZnO nanocomposite; Luminescence spectrum; Microwave-assisted method

PMID:
25546491
DOI:
10.1016/j.saa.2014.11.079
[Indexed for MEDLINE]

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