title: Microwave-assisted synthesis of CdO-ZnO nanocomposite and its antibacterial activity against human pathogens.
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.
authors.affiliation: School of Physics, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India.
authors.forename: K
authors.initials: K
authors.lastname: Karthik
authors.affiliation: School of Physics, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India. Electronic address: dhanus2k3@yahoo.com.
authors.forename: S
authors.initials: S
authors.lastname: Dhanuskodi
authors.affiliation: Department of Biotechnology and Genetic Engineering, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India.
authors.forename: C
authors.initials: C
authors.lastname: Gobinath
authors.affiliation: Department of Biotechnology and Genetic Engineering, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India.
authors.forename: S
authors.initials: S
authors.lastname: Sivaramakrishnan
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects*; D019187:Cadmium Compounds / Q000138:chemical synthesis* / Q000494:pharmacology; D006801:Humans; D049449:Luminescence; D008826:Microbial Sensitivity Tests; D008872:Microwaves; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D010087:Oxides / Q000138:chemical synthesis* / Q000494:pharmacology; D013052:Spectrometry, X-Ray Emission; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000138:chemical synthesis* / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D019187:Cadmium Compounds; D010087:Oxides; C029663:cadmium oxide; D015034:Zinc Oxide
keywords: Antibacterial activity; CdO–ZnO nanocomposite; Luminescence spectrum; Microwave-assisted method