Multifractal and optical bandgap characterization of Ta2O5 thin films deposited by electron gun method

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dc.contributor.author Mwema, Fredrick Madaraka
dc.contributor.author Reza Shakoury
dc.contributor.author Alireza Grayeli Korpi
dc.contributor.author Sahar Rezaee
dc.contributor.author Carlos Luna
dc.contributor.author Koushik Ghosh
dc.contributor.author Stanislav Jurečka
dc.contributor.author Ştefan Ţălu
dc.contributor.author Ali Arman
dc.date.accessioned 2020-05-15T07:34:35Z
dc.date.available 2020-05-15T07:34:35Z
dc.date.issued 2020
dc.identifier.uri http://repository.dkut.ac.ke:8080/xmlui/handle/123456789/1111
dc.description.abstract The micromorphology of tantalum pentoxide (Ta2O5) thin films, deposited on glass substrates by electron gun method, has been analyzed using atomic force microscopy (AFM), UV–Vis–NIR spectrophotometry and multifractal analyses. Two samples were grown at basic pressure of 7 × 10−6 mbar, work pressures of 1.3 × 10−4 and 2.0 × 10−4 mbar, and thicknesses of 0.38 μm and 0.39 μm, respectively. Subsequently, these samples were annealed at 300 °C for 2 h. The physical, structural and optical analyses were investigated by spectroscopic ellipsometry, spectrophotometry and AFM. The measured transmittance spectra were studied based on the Swanepoel method, whose results also yielded to the estimation of the film thickness and the refractive index. Finally, Ta2O5 thin films were characterized by AFM measurements and multifractal analyses for an accurate description of the 3-D surface microtexture features. The fractal examinations of the samples revealed that these microstructures exhibit multifractal characteristics. Essential parameters that characterized the thin films were compared and discussed thoroughly. en_US
dc.language.iso en en_US
dc.publisher Springer en_US
dc.title Multifractal and optical bandgap characterization of Ta2O5 thin films deposited by electron gun method en_US
dc.type Article en_US


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