Controlled synthesis and characterization of highly-oriented ZnO nanorods by electrodeposition method

Simimol, A and Sellarajan, Boominatha and Siju, John and Manikandanath, NT and Chowdhury, P and Barshilia, Harish C (2011) Controlled synthesis and characterization of highly-oriented ZnO nanorods by electrodeposition method. Technical Report. National Aerospace Laboratories.

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We present here the fabrication of ZnO coatings by electrodeposition method and their characterization. Solution composed of ZnCl2 and KCl was used as the electrolyte for the deposition of ZnO coatings. The ZnO coatings exhibited nanorod microstructure. The obtained ZnO nanorods were highly crystalline with hexagonal shape. A systematic study on the effects of various deposition parameters including the solution temperature, concentration of solution, applied potential, deposition time on the morphology and structural quality of ZnO nanorods was carried out. Growth of ZnO nanorods on various substrates like high purity Cu foil, commercial Cu, Cu film deposited on Si substrate and ITO coated glass was also studied. The significant changes in morphologies of ZnO nanorods due to the variations in the deposition parameters were discussed. We found that the growth rate as well as the morphology of the ZnO nanorods can be effectively controlled by varying the deposition parameters and the substrates. Morphological studies and surface roughness were investigated by Field Emission Scanning Electron Microscopy (FESEM) and 3-D profilometry, respectively. The FESEM studies indicated that the average diameter of the ZnO nanorods was in the range of 100-300 nm. The X-ray diffraction showed preferred orientation of ZnO nanorods along (002) plane. The Raman peak at 431 cm-1, confirmed the wurzite hexagonal phase of ZnO. The optical properties of ZnO nanorods were studied by photoluminescence spectroscopy, which revealed a strong UV emission at 382 nm. The X-ray photoelectron spectroscopy demonstrated ZnO coatings were stoichiometric. Transmission Electron Microscopy further confirmed the growth direction of ZnO nanorods along C-axis and ZnO wurtzite phase with a = 0.3380 nm and c = 0.5450 nm.

Item Type: Monograph (Technical Report)
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Dr. Harish C. Barshilia
Date Deposited: 13 Feb 2012 04:40
Last Modified: 17 Aug 2015 10:10

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