Naslov
Nucleation of Copper on an Assembly of Carbon Microelectrodes

Autori
Grubač, Zoran ; Metikoš-Huković, Mirjana

Izvornik
Materials Letters (0167-577X) 61 (2007), 3; 794-798

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

Ključne riječi
copper; microelectrodes; thin films; fibre technology; kinetics; electrical properties

Sažetak
The initial stage of copper electrodeposition on the electrochemically activated assembly of carbon microelectrodes from an acid solution of copper sulfate was investigated using cyclic voltammetry, potentiostatic pulse technique and electrochemical impedance spectroscopy. Analysis of the experimental current transients has been carried out using a non-linear fitting procedure according the model that takes into account spherical diffusion towards a disc-shaped microelectrode. The higher values of diffusion coefficient in comparison with those observed on planar electrodes were explained with an increased diffusion caused by the electrode geometry. Impedance spectra showed two time constants, the high-frequency related to the charge transfer process and the low-frequency corresponded to the deposit morphology.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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