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Cyclic voltammetry and impedance studies of undoped diamond films

Mosińska L., Kowalska M., Popielarski P., Fabisiak K., Paprocki K., Szybowicz M., Wrzyszczynski A., Zhusupkalieva G. K.

Materials Science Poland

2013

Vol. 31, No. 1

146-150

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.

Electroplating of copper interconnects: A cyclic voltammetry study

Freundlich P., Kubečka P.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

2004

z. 78

79-84

The role of additives in the electroplating of copper films deposited from sulfuric acid - copper sulfate solution was investigated by the cyclic voltammetry. Strong effects of additives were found both during the underpotencial deposition and in the bulk deposition demonstrating the leveling, suppressing and accelerating abilities of these organic compounds.