Journal
ELECTROANALYSIS
Volume 22, Issue 24, Pages 2915-2923Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201000389
Keywords
Electrode kinetics; Polyacrylonitrile fibers; Pitch fibers; Nanostructures
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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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