Naslov
Correlation between electronic and corrosion properties of the passive oxide film on Nitinol

Autori
Katić, Jozefina ; Metikoš-Huković, Mirjana

Izvornik
Acta chimica Slovenica (1318-0207) 61 (2014), 2; 350-356

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Nitinol; passive films; semiconducting properties; electrochemical impedance spectroscopy (EIS); Mott-Schottky analysis (MS)

Sažetak
The oxide film (TiO2) was formed on Nitinol potentiostatically in an acetic acid solution. Deep understanding of electronic properties of this film is needed to predict long-term corrosion properties of Nitinol implant material in simulated body fluid conditions. The capacitance measurements were performed under depletion conditions to study electronic (semiconducting) properties. The space charge, formed at the solid|liquid interface, creates the barrier for the corrosion processes in aggressive (bio)environment. According to the results of electrochemical impedance spectroscopy (EIS) and Mott-Schottky analysis (MS), the passive film on Nitinol behaves as amorphous highly-doped n-type semiconductor. The values of electronic structure parameters (the flat-band potential, Efb and the carrier (donor) density, ND) were corrected for frequency dispersion.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

Napomena
Rad je prezentiran na skupu 4th Symposium on Electrochemistry - South East Europe (RSE-SEE 2013) ; održanom od 26.-30.05.2013 g., Ljubljana, Slovenija.

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