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5928936 
Journal Article 
Prepared sigma-MnO2 thin films by chemical bath deposition methods and study of its optical and microstructure properties 
Astinchap, B; Moradian, R; Namdari, T; Jurecka, S; Talu, S 
2019 
1 
Optical and Quantum Electronics
ISSN: 0306-8919
EISSN: 1572-817X 
51 
6 
WOS:000468205300003 
In this work, sigma-MnO2 thin films deposited by chemical bath deposition method at three concentration of solution. The influence of concentration on thickness, micromorphology and optical parameters were investigated by XRD, SEM, UV-Vis spectrophotometer, atomic force microscopic and multifractal analyses. The optical band gap of thin films is decreased with increase in concentration. The optical parameters: refractive index and real part of dielectric constant are increased with increase in concentration, but decrease in extinction coefficient and imaginary parts of dielectric constant are observed. The micromorphology and roughness of layers surface are changed as function of concentration. The studied samples have multifractal properties and can be included in computer algorithms useful for graphical representation of 3-D microtexture surfaces of sigma-MnO2 thin films. 
Chemical bath deposition; Thin films; Concentration; MnO2; Multifractal analysis; Optical properties