Development of a quantitative in-situ UV-Vis scanning reflectance spectroelectrochemical probe for the investigation of microwell electrodes
Development of a quantitative in-situ UV-Vis scanning reflectance spectroelectrochemical probe for the investigation of microwell electrodes
A study of the performance of fibre optic reflectance probes for the investigation of spectroelectrochemistry at Pt and Ag disk electrodes and Pt and Ag microwell electrodes is detailed. Specific attention is paid to the relationship between spectral and electrochemical measurements. As a test system, electrochemical oxidation and reduction of the redox system [Ir(Cl)6]3- is reported for chronoamperometric and cyclic voltammetric experiments. Good quantitative agreement between a spectroelectrochemical theory and the experimental data obtained is observed, if the time period of the experiment is maintained below ~ 10 s. At longer times, limitations associated with natural convection and edge effects are illustrated.
A dynamic imaging technique is developed with the aid of a white resin supported working electrode (WSWE). This is shown to enable the tracking of the diffusion field of the electrode highlighting the edge and natural convection effects associated with the diffusion field generated. The ability for this dynamic imaging technique to produce quantitatively analysable results is investigated.
A single-fibre reflectance probe is assessed for its ability to investigate spectroelectrochemical changes occurring in microwell electrodes that are used for lab-on-chip devices.
University of Southampton
Joce, David John
7fe9459a-8951-45f6-bf4a-7ac360b99e96
28 February 2015
Joce, David John
7fe9459a-8951-45f6-bf4a-7ac360b99e96
Birkin, Peter R.
ba466560-f27c-418d-89fc-67ea4f81d0a7
Joce, David John
(2015)
Development of a quantitative in-situ UV-Vis scanning reflectance spectroelectrochemical probe for the investigation of microwell electrodes.
University of Southampton, Chemistry, Doctoral Thesis, 297pp.
Record type:
Thesis
(Doctoral)
Abstract
A study of the performance of fibre optic reflectance probes for the investigation of spectroelectrochemistry at Pt and Ag disk electrodes and Pt and Ag microwell electrodes is detailed. Specific attention is paid to the relationship between spectral and electrochemical measurements. As a test system, electrochemical oxidation and reduction of the redox system [Ir(Cl)6]3- is reported for chronoamperometric and cyclic voltammetric experiments. Good quantitative agreement between a spectroelectrochemical theory and the experimental data obtained is observed, if the time period of the experiment is maintained below ~ 10 s. At longer times, limitations associated with natural convection and edge effects are illustrated.
A dynamic imaging technique is developed with the aid of a white resin supported working electrode (WSWE). This is shown to enable the tracking of the diffusion field of the electrode highlighting the edge and natural convection effects associated with the diffusion field generated. The ability for this dynamic imaging technique to produce quantitatively analysable results is investigated.
A single-fibre reflectance probe is assessed for its ability to investigate spectroelectrochemical changes occurring in microwell electrodes that are used for lab-on-chip devices.
Text
Corrected Final MPhil thesis.pdf
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Published date: 28 February 2015
Organisations:
University of Southampton, Chemistry
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Local EPrints ID: 377832
URI: http://eprints.soton.ac.uk/id/eprint/377832
PURE UUID: 1561c986-868e-4fe4-98a2-f17143b95f2f
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Date deposited: 13 Jul 2015 08:44
Last modified: 15 Mar 2024 02:47
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Author:
David John Joce
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