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Single walled carbon nanotube channel flow electrode : hydrodynamic voltammetry at the nanomolar level
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Snowden, Michael E., Unwin, Patrick R. and Macpherson, Julie V. (2011) Single walled carbon nanotube channel flow electrode : hydrodynamic voltammetry at the nanomolar level. Electrochemistry Communications, Volume 13 (Number 2). pp. 186-189. doi:10.1016/j.elecom.2010.12.009 ISSN 13882481.
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Official URL: http://dx.doi.org/10.1016/j.elecom.2010.12.009
Abstract
The use of single walled carbon nanotube (SWNT) band electrodes in a channel flow cell, for low concentration detection, with hydrodynamic voltammetry is reported. A two dimensional SWNT network electrode is combined with a one piece channel flow cell unit, fabricated by microstereolithography. This configuration provides well defined hydrodynamics over a wide range of volume flow rates (0.05–25 mL min− 1). Limiting current measurements, from linear sweep voltammograms, are in good agreement with the channel electrode Levich equation, for the one electron oxidation of ferrocenylmethyl trimethylammonium (FcTMA+), over a wide concentration range, 1 × 10− 8 M to 2.1 × 10− 5 M, with a detection limit of 5 nM. At the highest flow rates, some influence of the slightly recessed electrode geometry arising from the SWNT electrode fabrication is noted. However, this can be accounted for by a full simulation of the hydrodynamics and solution of the resulting convection–diffusion equation. Application of this hydrodynamic configuration to the voltammetric detection of dopamine is also demonstrated.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||
Library of Congress Subject Headings (LCSH): | Electrodes, Voltammetry, Nanotubes, Dopamine, Hydrodynamics, Electrochemical analysis, Electrochemistry | ||||
Journal or Publication Title: | Electrochemistry Communications | ||||
Publisher: | Elsevier Inc. | ||||
ISSN: | 13882481 | ||||
Official Date: | February 2011 | ||||
Dates: |
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Volume: | Volume 13 | ||||
Number: | Number 2 | ||||
Page Range: | pp. 186-189 | ||||
DOI: | 10.1016/j.elecom.2010.12.009 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 18 December 2015 | ||||
Date of first compliant Open Access: | 18 December 2015 | ||||
Funder: | University of Warwick. Molecular Organisation and Assembly in Cells, European Research Council (ERC), European Regional Development Fund (ERDF), Advantage West Midlands (AWM), Birmingham Science City |
Data sourced from Thomson Reuters' Web of Knowledge
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