<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></abstract>

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.

Cyclic voltammetry and impedance studies of undoped diamond films

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

Faculty of Chemical Technology and Engineering, University of Technology and Life Sciences, Seminaryjna 3, 85-326, Bydgoszcz, Poland

Faculty of Technical Physics, Poznań University of Technology, Nieszawska 13A, 60-965, Poznań, Poland

Char of Mathematics and Physics, WKSU, 090000, Uralsk, Kazachstan

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Cyclic voltammetry and impedance studies of undoped diamond films"}

The undoped, polycrystalline diamond films were deposited on tungsten wire substrates by hot filament chemical vapor deposition (HF CVD), using a precursor gas...

Cyclic voltammetry and impedance studies of undoped diamond films

Published Online: Feb 09, 2013

Page range: 146 - 150

DOI: https://doi.org/10.2478/s13536-012-0081-5

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

© 2013 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Cyclic voltammetry and impedance studies of undoped diamond films

Published Online: Feb 09, 2013

Page range: 146 - 150

DOI: https://doi.org/10.2478/s13536-012-0081-5

KeywordsCVD diamond, Raman spectroscopy, cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS)

© 2013 Wroclaw University of Technology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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