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dc.contributor.authorTan, Yong-jun
dc.contributor.authorStevenson, G.
dc.contributor.authorBaker, R.
dc.contributor.authorElton, D.
dc.contributor.authorGillow, K.
dc.contributor.authorZhang, Jie
dc.contributor.authorBond, A.
dc.contributor.authorGavaghan, D.
dc.identifier.citationTan, Yong-jun and Stevenson, Gareth P. and Baker, Ruth E. and Elton, Darryl and Gillow, Kathryn and Zhang, Jie and Bond, Alan M. and Gavaghan, David J. 2009. Designer based Fourier transformed voltammetry: A multi-frequency, variable amplitude, sinusoidal waveform. Journal of Electroanalytical Chemistry. 634 (1): pp. 11-21.

Fourier transform methods allow custom-designed complex waveforms to be used in ac voltammetry. Commonly a single wave or sum of sine waves of variable angular frequency but constant amplitude superimposed onto a dc ramp are employed. In the present case, a custom-designed waveform consisting of a combination of eight sine waves is introduced, with the property that each sine wave within the composite waveform has the property where i represents the ith sine wave. Frequencies (and amplitudes) employed in a single experiment cover the range from 34.94 Hz (20 mV) to 1970.01 Hz (2.66 mV). Reversibility is readily detected via use of this designer waveform by noting a constant peak height Ip (wt) for all eight frequencies, whereas Ip (wt) values decrease in a characteristic manner with increasing frequency for a quasi-reversible process or when uncompensated resistance is present, as demonstrated experimentally and theoretically. Importantly, background charging current contributions do not increase to a level that makes measurement of faradaic current difficult at high frequencies and hence charging current is readily corrected for over the entire frequency range of interest.

dc.subjectFourier transform voltammetry
dc.subjectDesigner ac waveform
dc.subjectVariable amplitude and frequency
dc.titleDesigner based Fourier transformed voltammetry: A multi-frequency, variable amplitude, sinusoidal waveform
dc.typeJournal Article
dcterms.source.titleJournal of Electroanalytical Chemistry

The link to the journal’s home page is: Copyright © 2009 Elsevier B.V. All rights reserved

curtin.accessStatusOpen access
curtin.facultyDepartment of Applied Chemistry
curtin.facultySchool of Science and Computing
curtin.facultyFaculty of Science and Engineering

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