2010
DOI: 10.1002/elan.201000389
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Electrode Kinetics and Sensitivity of Nanostructured Electrodes from Different Carbon Fiber Precursor Materials

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 great… Show more

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Cited by 6 publications
(9 citation statements)
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“…The high sensitivity in FSV is unique and is not observed in CV (Table S1). In part, sensitivity enhancement in FSV is a result of signal averaging . In addition to signal averaging, adsorption, when present, can enhance sensitivity, especially at high scan rates .…”
Section: Resultssupporting
confidence: 73%
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“…The high sensitivity in FSV is unique and is not observed in CV (Table S1). In part, sensitivity enhancement in FSV is a result of signal averaging . In addition to signal averaging, adsorption, when present, can enhance sensitivity, especially at high scan rates .…”
Section: Resultssupporting
confidence: 73%
“…In this work, catalyzed and fast electrochemical oxidation of CA and TP was realized at low positive potentials in aqueous solutions at nanostructured‐ nanoporous CFE in FSV. The apparent catalysis of the oxidation is a result of the electrode structure and rapid signal acquisition in FSV . As a result, in FSV with signal averaging, high sensitivity was achieved in the measurements of CA and TP in aqueous solutions that is significantly higher than in previously reported determinations.…”
Section: Introductionmentioning
confidence: 99%
“…32 These electrodes were then nanostructured as described previously by an electrochemical etch method to expose the nanofeatures at disk cross-sections of the fibers. 30 The electrochemical etch of the fiber surface exposes the nodules and nanopores that form the carbon fiber nanostructure. Potential window, scan rate, and electrolyte were selected to limit the overoxidation of the electrode surface and to allow reconditioning of the electrode surface for repeated use.…”
Section: Fabrication Of Nanostructured Carbon Fiber Microdisk Electrodesmentioning
confidence: 99%
“…Nanostructured polyacrylonitrile (PAN) carbon fiber microdisk electrodes were used because of their demonstrated high sensitivity in electrochemical biosensing. 30 Since in practical applications, it is desirable to detect p-AP at micro-to submicromolar concentrations, the large active surface area of the nanostructured microdisk electrodes and rapid rate of mass transport to the microdisks were expected to contribute to the high detection sensitivity. 32 As pointed out above, the interest in the use of p-AP as a reporter molecule in the electrochemical detection of immunoassays stems from high sensitivity and reversibility of its electrode reactions.…”
Section: Nanomolar Detection Of P-np At Nanostructured Pan Carbon Fib...mentioning
confidence: 99%
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