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Effect of deposition voltage on the optical properties of nickel cobalt oxide Nanofilms deposited by Electrodeposition method

Author: 
Umeokwonna, N. S. Ekpunobi, A. J. and Ekwo, P. I.
Subject Area: 
Physical Sciences and Engineering
Abstract: 

Nickel cobalt oxide nanofilms were grown by electrodepositing method using heptahydrated nickel tetraoxosulphate (VI) salt as source of nickel ion, Citric acid as oxidizing agent, hexahydrated cobalt chloride salt as source of cobalt ion, and Sodium hydroxide as pH adjuster. The deposition voltage was varied from 8.5V to 14.5V in intervals of 1.5V. Results of the study show that the films exhibit low absorbance and low reflectance in all the regions of electromagnetic spectrum; and high transmittance in the regions. The optical properties viz, absorbance, reflectance, refractive index, extinction coefficient, are directly proportional to the deposition voltage while percentage transmittance is inversely proportional.

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