Sensing via Voltammetric Ion-Transfer at an Aqueous-Organogel Micro-Interface Array
Ion-transfer across micro-interfaces between aqueous electrolyte and gellified organic electrolyte phases formed at micropores in a micromachined silicon membrane was studied. The membrane used had 30 pores of ca. 11 μm radius, with pore-pore separation of ca. 20-times the radius. Near-steady-state...
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| Format: | Journal Article |
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AMER SCIENTIFIC PUBLISHERS
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/38289 |
| _version_ | 1848755280000581632 |
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| author | Herzog, G. O'Sullivan, S. Ellis, J. Arrigan, Damien |
| author_facet | Herzog, G. O'Sullivan, S. Ellis, J. Arrigan, Damien |
| author_sort | Herzog, G. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Ion-transfer across micro-interfaces between aqueous electrolyte and gellified organic electrolyte phases formed at micropores in a micromachined silicon membrane was studied. The membrane used had 30 pores of ca. 11 μm radius, with pore-pore separation of ca. 20-times the radius. Near-steady-state voltammetry was obtained on the forward (aqueous to organogel transfer) sweep and peak-shaped voltammetry on the reverse (organogel to aqueous transfer) sweep, consistent with the dominance of radial diffusion and linear diffusion transport processes during the forward and reverse sweeps, respectively. Computational simulation of voltammetry also produced these responses. Differential pulse stripping voltammetry at these micro-interface arrays showed that the stripping current saturated at a preconcetration time of 30 s, attributed to the rapid diffusion from the aqueous phase to the micro-interfaces and the slow diffusion within the organic phase. The results provide the basis for chemical or biochemical sensing based on ion-transfer voltammetry at micro-interface arrays formed at micromachined membranes. |
| first_indexed | 2025-11-14T08:53:47Z |
| format | Journal Article |
| id | curtin-20.500.11937-38289 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:53:47Z |
| publishDate | 2011 |
| publisher | AMER SCIENTIFIC PUBLISHERS |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-382892017-09-13T15:57:06Z Sensing via Voltammetric Ion-Transfer at an Aqueous-Organogel Micro-Interface Array Herzog, G. O'Sullivan, S. Ellis, J. Arrigan, Damien Liquid-Liquid Interface Micropore Ion-Transfer Voltammetry Silicon Membrane Ion-transfer across micro-interfaces between aqueous electrolyte and gellified organic electrolyte phases formed at micropores in a micromachined silicon membrane was studied. The membrane used had 30 pores of ca. 11 μm radius, with pore-pore separation of ca. 20-times the radius. Near-steady-state voltammetry was obtained on the forward (aqueous to organogel transfer) sweep and peak-shaped voltammetry on the reverse (organogel to aqueous transfer) sweep, consistent with the dominance of radial diffusion and linear diffusion transport processes during the forward and reverse sweeps, respectively. Computational simulation of voltammetry also produced these responses. Differential pulse stripping voltammetry at these micro-interface arrays showed that the stripping current saturated at a preconcetration time of 30 s, attributed to the rapid diffusion from the aqueous phase to the micro-interfaces and the slow diffusion within the organic phase. The results provide the basis for chemical or biochemical sensing based on ion-transfer voltammetry at micro-interface arrays formed at micromachined membranes. 2011 Journal Article http://hdl.handle.net/20.500.11937/38289 10.1166/sl.2011.1601 AMER SCIENTIFIC PUBLISHERS restricted |
| spellingShingle | Liquid-Liquid Interface Micropore Ion-Transfer Voltammetry Silicon Membrane Herzog, G. O'Sullivan, S. Ellis, J. Arrigan, Damien Sensing via Voltammetric Ion-Transfer at an Aqueous-Organogel Micro-Interface Array |
| title | Sensing via Voltammetric Ion-Transfer at an Aqueous-Organogel Micro-Interface Array |
| title_full | Sensing via Voltammetric Ion-Transfer at an Aqueous-Organogel Micro-Interface Array |
| title_fullStr | Sensing via Voltammetric Ion-Transfer at an Aqueous-Organogel Micro-Interface Array |
| title_full_unstemmed | Sensing via Voltammetric Ion-Transfer at an Aqueous-Organogel Micro-Interface Array |
| title_short | Sensing via Voltammetric Ion-Transfer at an Aqueous-Organogel Micro-Interface Array |
| title_sort | sensing via voltammetric ion-transfer at an aqueous-organogel micro-interface array |
| topic | Liquid-Liquid Interface Micropore Ion-Transfer Voltammetry Silicon Membrane |
| url | http://hdl.handle.net/20.500.11937/38289 |