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Potential modulated reflectance spectroscopy of anodic oxide films on titanium

✍ Scribed by D.J. Blackwood; L.M. Peter

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 775 KB
Volume: 35
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(90)90045-2

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✦ Synopsis

Ahtract-Potential modulated reflectance (PMR) spectroscopy has been used to mvestlgate thm anodlc oxide films formed on tltamum m sulphunc acid The ongm of the reflectance modulation IS dlscussed and the expenmental results are compared with theoretlcal calculations based on the three layer model The overall shape and the dependence of the PMR spectra on film thickness have been modelled satlsfactonly by assummg that the band gap of the oxide m the presence of an electric field IS Increased due to dlelectnc polarlsatlon The potential dependence of the modulated reflectance response for films of constant thickness was related to the electric field dlstrlbutlon m the oxide and the analysis showed that the modulated reflectance response 1s dominated by electroabsorptlon The results demonstrate that PMR spectroscopy offers a more reliable method than Mott-Schottky plots for determining the flat-band potential of the oxide

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