Cyclic voltammetry and impedance studies of undoped diamond films

• Autorzy: Mosińska L. , Kowalska M. , Popielarski P. , Fabisiak K. , Paprocki K. , Szybowicz M. , Wrzyszczynski A. , Zhusupkalieva G. K.
• Języki publikacji: EN

Abstrakty

EN

The undoped, polycrystalline diamond films were deposited on tungsten wire substrates by hot filament chemical vapor deposition (HF CVD), using a precursor gas mixture of methanol with excess of hydrogen. The morphology and quality of the as-deposited films were monitored by scanning electron microscopy (SEM) and Raman spectroscopy. The surface morphology analyzed by SEM resembles a continuous and well faceted diamond film. Raman results showed essential differences in qualities of diamond films grown at different hydrocarbon concentrations. The electrochemical properties of diamond electrodes were examined with cyclic voltammetry (CV) and the electrochemical impedance spectroscopy (EIS). The CV experiments revealed a large chemical window (>~4.3 V) of undoped diamond. Analysis of the ferrocyanide-ferricyanide couple at a diamond electrode suggests some extent of electrochemical quasi-reversibility, but the rates of charge transfer across the diamond substrate interface vary with diamond quality.

Słowa kluczowe

EN

CVD diamond; Raman spectroscopy; cyclic voltammetry (CV); electrochemical impedance spectroscopy (EIS)

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2013
• Tom: Vol. 31, No. 1
• Strony: 146--150
• Opis fizyczny: Bibliogr. 7 poz., rys., tab., wykr.

Twórcy

autor

Mosińska L.

autor

Kowalska M.

autor

Popielarski P.

autor

Fabisiak K.

autor

Paprocki K.

autor

Szybowicz M.

autor

Wrzyszczynski A.

autor

Zhusupkalieva G. K.

• Institute of Physics, Kazimierz Wielki University, Powstanców Wielkopolskich 2, 85-090 Bydgoszcz, Poland

Bibliografia

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