Electrode Kinetics and Sensitivity of Nanostructured Electrodes from Different Carbon Fiber Precursor Materials |
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Authors: | Abraham Boateng Rachel Cohen‐Shohet Anna Brajter‐Toth |
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Institution: | Department of Chemistry, University of Florida, Gainesville, Florida 32611‐7200, USA fax: 352?392?4651 |
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Abstract: | Correlation of properties of common carbon fiber precursor materials, polyacrylonitrile (PAN) and pitch, with kinetics and sensitivity of microdisk electrodes, PAN T650, PAN HCB and Pitch P25, nanostructured by an electrochemical etching method was tested. Sensitivity of PAN electrodes is higher but kinetics are slower than at pitch electrodes due to more defects in PAN. Because of more surface oxides at PAN T650 adsorption of dopamine is greater than at PAN HCB electrodes but for uric acid adsorption is greater at PAN HCB. Uric acid sensitivity is related to high conductivity of PAN fibers, with an inverse relationship observed for dopamine. |
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Keywords: | Electrode kinetics Polyacrylonitrile fibers Pitch fibers Nanostructures |
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