A voltammetric study of direct electron transfer to cytochrome c using a very large assembly of carbon microelectrodes

Kudera, Michael; Nakagawa, Yasue; Fletcher, Stephen; Hill, H. Allen O.

doi:10.1039/b107541c

Cited by 18 publications

(12 citation statements)

References 15 publications

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“…These advantages of OMC/GC electrode could be mainly attributed to the unique properties of OMC. First, there are plenty of edge plane-like defects and oxygencontaining functional groups on the surface of OMC, which may provide many favorable sites for electron transfer to molecules [17,31,32], resulting in a large, increasing peak current and low oxidation overpotential. The presence of the oxygen-containing functional groups on the surface of OMC, e.g., -COOH, -C=O, and -OH, has been confirmed by Zhou et al [16].…”

Section: Electrochemical Behaviors Of a Mixture Of Dihydroxybenzene Imentioning

confidence: 99%

Electrochemical properties and simultaneous determination of dihydroxybenzene isomers at ordered mesoporous carbon-modified electrode

et al. 2009

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The voltammetric behaviors of dihydroxybenzene isomers were studied at an ordered mesoporous carbonmodified glassy carbon (OMC/GC) electrode. Compared to the bare electrode, the electrocatalytic activity of the modified electrode toward dihydroxybenzenes is evidenced by the increase of the peak current and the decrease of the peak separation (DE p ) in 0.1 M pH 5.0 phosphate buffer solution (PBS). Furthermore, at the OMC/GC-modified electrode, the three isomers could be separated entirely. The oxidation peak potential difference between hydroquinone and catechol is 154 mV, whereas that difference between catechol, and resorcinol is 370 mV. In the amperometric detection, the peak currents of dihydroxybenzene increased linearly with increasing dihydroxybenzene contents. The detection limits were 7.6 9 10 -8 M, 1.0 9 10 -7 M, 9.0 9 10 -8 M for hydroquinone, catechol and resorcinol, respectively, which are the lowest values ever reported for dihydroxybenzene isomers. These make OMC/GC electrode a promising candidate for the simultaneous determination of isomers.

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Section: Electrochemical Behaviors Of a Mixture Of Dihydroxybenzene Imentioning

confidence: 99%

Electrochemical properties and simultaneous determination of dihydroxybenzene isomers at ordered mesoporous carbon-modified electrode

et al. 2009

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“…All those facts demonstrate that OMCE has much more favorable electron transfer kinetics than CNTE and GPE as discussed above. The possible explanation may be related to the high density of edge plane defect sites on the ordered mesoporous carbon accessible for the electrolyte [14 -16], which are much more favorable for electron transfer reactions than the basal plane sites [20,30].…”

mentioning

confidence: 99%

Bioanalytical Application of the Ordered Mesoporous Carbon Modified Electrodes

et al. 2008

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An ordered mesoporous carbon modified electrode (OMCE) was prepared by film forming method. The electrochemical behavior of the OMCE was evaluated in connection with the electrochemistry of some electroactive biospecies, such as ascorbic acid (AA), acetaminophenol (AP), cysteine (CySH), dopamine (DA), epinephrine (EP), uric acid (UA), b-nicotinamide adenine dinucleotide (reduced disodium salt hydrate, NADH), and hydrogen peroxide (H 2 O 2 ) with cyclic voltammetry. Compared with the conventional carbon nanotubes (CNT) and graphite powder (GP) modified electrodes, the OMCE provided the best electrochemical reactivities in all cases associated with decreased over potential, better-defined peak shape, and higher sensitivity. In addition, the OMC, CNT, and GP modified electrodes were employed as sensitive sensors for H 2 O 2 and NADH quantification and as stable platforms for the fabrication of glucose and ethanol biosensors on which the enzymes were immobilized.

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“…However, the largest assembly of microelectrodes reported consists in more than 8000 carbon fiber microelectrodes wired in parallel embedded in an epoxy resin [74]. Kudera et al use this large RAM electrode for the direct reduction of the metalloprotein ferricytochrome c to ferrocytochrome.…”

Section: þmentioning

confidence: 99%

Electroanalysis Utilizing Amperometric Microdisk Electrode Arrays

et al. 2007

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This article reviews the literature dealing with electroanalytical applications of ultramicroelectrode arrays over the past twenty years. A brief theoretical description of the mass transport mode governing their behavior is given, after which the main fabrication methods are described. The applications described in the later sections of this review range from conventional electroanalysis, namely trace metal stripping methods, using mercury modified arrays to more recent advances in the field of biosensors (enzymatic, immunosensors and nucleic acid based ones).

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A voltammetric study of direct electron transfer to cytochrome c using a very large assembly of carbon microelectrodes

Cited by 18 publications

References 15 publications

Electrochemical properties and simultaneous determination of dihydroxybenzene isomers at ordered mesoporous carbon-modified electrode

Electrochemical properties and simultaneous determination of dihydroxybenzene isomers at ordered mesoporous carbon-modified electrode

Bioanalytical Application of the Ordered Mesoporous Carbon Modified Electrodes

Electroanalysis Utilizing Amperometric Microdisk Electrode Arrays

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