Microwave Irradiation Effect on Structural, Optical, and Thermal Properties of Cadmium Oxide Nanostructure
N. Rajesha, J.C. Kannanb, T. Krishnakumarc and G. Nerid
aDepartment of Physics, KSR College of Engineering, Tiruchengode, Tamilnadu - 637215, India
bDepartment of Physics, KSR Institute for Engineering and Technology, Tiruchengode, Tamilnadu - 637215, India
cDepartment of Physics, Tagore Institute of Engineering and Technology, Attur, Salem, Tamilnadu - 636112, India
dDepartment of Industrial Chemistry and Materials Engineering, University of Messina, 98166 Messina, Italy
Received: September 14, 2013
Full Text PDF
Cadmium oxide nanostructures were prepared by microwave assisted wet chemical technique at different time intervals. Results on structural, optical, and thermal properties of the CdO nanostructures as a function of the microwave irradiation were reported. The X-ray diffraction data indicates that the sample showed perfection in the microstructural improvement as a function of microwave irradiation. Surface morphological changes with different time of microwave irradiation were recorded by transmission electron microscope and the particle size were found in the ranges from 5 to 30 nm. Chemical composition and thermal stability of the samples were analyzed by energy dispersive X-ray spectrum and thermogravimetric analysis, respectively. The band gaps were shifted towards the blue region due to the Moss-Burstein effect and it exhibited direct band transitions, which corresponds to optical band gaps of 3.92-4.20 eV and contrast behavior of optical properties of CdO nanostructure in UV and IR regions were registered. Room temperature photoluminescence spectra revealed that the intensity of luminescent emission tends to decrease with the increase in exposure of microwave irradiation.

DOI: 10.12693/APhysPolA.125.1229
PACS numbers: 81.07.-b, 68.37.Lp, 78.67.-n, 81.70.Jb