Designer based Fourier transformed voltammetry: A multi-frequency, variable amplitude, sinusoidal waveform
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 c...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
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Elsevier
2009
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/4179 |
| _version_ | 1848744442963427328 |
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| author | Tan, Yong-jun Stevenson, G. Baker, R. Elton, D. Gillow, K. Zhang, Jie Bond, A. Gavaghan, D. |
| author_facet | Tan, Yong-jun Stevenson, G. Baker, R. Elton, D. Gillow, K. Zhang, Jie Bond, A. Gavaghan, D. |
| author_sort | Tan, Yong-jun |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T06:01:32Z |
| format | Journal Article |
| id | curtin-20.500.11937-4179 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:01:32Z |
| publishDate | 2009 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-41792017-09-13T16:02:38Z Designer based Fourier transformed voltammetry: A multi-frequency, variable amplitude, sinusoidal waveform Tan, Yong-jun Stevenson, G. Baker, R. Elton, D. Gillow, K. Zhang, Jie Bond, A. Gavaghan, D. Fourier transform voltammetry Designer ac waveform Variable amplitude and frequency 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. 2009 Journal Article http://hdl.handle.net/20.500.11937/4179 10.1016/j.jelechem.2009.07.007 Elsevier fulltext |
| spellingShingle | Fourier transform voltammetry Designer ac waveform Variable amplitude and frequency Tan, Yong-jun Stevenson, G. Baker, R. Elton, D. Gillow, K. Zhang, Jie Bond, A. Gavaghan, D. Designer based Fourier transformed voltammetry: A multi-frequency, variable amplitude, sinusoidal waveform |
| title | Designer based Fourier transformed voltammetry: A multi-frequency, variable amplitude, sinusoidal waveform |
| title_full | Designer based Fourier transformed voltammetry: A multi-frequency, variable amplitude, sinusoidal waveform |
| title_fullStr | Designer based Fourier transformed voltammetry: A multi-frequency, variable amplitude, sinusoidal waveform |
| title_full_unstemmed | Designer based Fourier transformed voltammetry: A multi-frequency, variable amplitude, sinusoidal waveform |
| title_short | Designer based Fourier transformed voltammetry: A multi-frequency, variable amplitude, sinusoidal waveform |
| title_sort | designer based fourier transformed voltammetry: a multi-frequency, variable amplitude, sinusoidal waveform |
| topic | Fourier transform voltammetry Designer ac waveform Variable amplitude and frequency |
| url | http://hdl.handle.net/20.500.11937/4179 |