Fullerene film electrodes in aqueous solutions Part 2. Effects of doping cations

Szűcs, András; Loix, A.; Nagy, J.B.; Lamberts, L.

doi:10.1016/0022-0728(95)04233-4

Cited by 69 publications

(49 citation statements)

References 12 publications

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“…The surface morphology of the modified electrode is shown in Figure 1 which clearly indicates deposition of C 60 particles. The surface coverage of C 60 on GCE has been calculated as 85% as reported earlier [29]. The electrode surface was cleaned after each run by applying a potential of À 200 mV for 60 s to desorb any adsorbed material.…”

Section: Modification Of Gce By C 60 -Fullerenementioning

confidence: 99%

Voltammetric Determination of 2′‐Deoxyadenosine and Adenine in Urine of Patients with Hepatocellular Carcinoma Using Fullerene‐C₆₀‐modified Glassy Carbon Electrode

2009

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A fullerene-C 60 -modified glassy carbon electrode has been examined for the simultaneous determination of 2'-deoxyadenosine (2'-dAdo) and adenine in human blood and urine using Osteryoung square-wave voltammetry (OSWV) at pH 7.2. Compared to bare glassy carbon electrode (GCE), the modified electrode displays a shift of the oxidation potential in the negative direction with significant increase in the peak current for both the analytes. At modified electrode well-defined anodic peaks at potential of 1248 mV and 994 mV are observed for 2'-dAdo and adenine respectively. Linear calibration curves were obtained within the concentration range 10 nM to 100 mM for both the compounds in 0.1 M phosphate buffer solution (PBS) with the limit of detection 0.8 Â 10 À8 M and 0.95 Â 10 À8M for 2'-dAdo and adenine respectively. The analytical utility of the present method is demonstrated by quantitative detection of 2'-dAdo and adenine in human urine of normal subjects as well as in patients with hepatocellular carcinoma. Interfering effect of some coexisting metabolites has also been reported.

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Section: Modification Of Gce By C 60 -Fullerenementioning

confidence: 99%

Voltammetric Determination of 2′‐Deoxyadenosine and Adenine in Urine of Patients with Hepatocellular Carcinoma Using Fullerene‐C₆₀‐modified Glassy Carbon Electrode

2009

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“…Reduced C 60 -films with doping of cations was reported subsequently and the films exhibit as a conductive material to be used as electrodes and the electrocatalytic properties was studied [17]. More recently, the heterogeneous charge transfer step due to the presence of edge effect of graphite powder in fullerenes and related carbon materials has been critically discussed [18 -19].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Oxidation of Methionine Mediated by a Fullerene‐C₆₀ Modified Gold Electrode

Tan

Goh

2008

Electroanalysis

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The usefulness of a C 60 -fullerene modified gold (Au) electrode in mediating the oxidation of methionine in the presence of potassium ions electrolyte has been demonstrated. During cyclic voltammetry, an oxidation peak of methionine appearing at þ 1.0 V vs. Ag/AgCl was observed. The oxidation current of methionine is enhanced by about 2 times using a C 60 modified gold electrode. The current enhancement is significantly dependent on pH, temperature and C 60 dosage. Calibration plot reveals linearity of up to 0.1 mM with a current sensitivity of close to 50 mA L mol À1 and detection limit of 8.2 Â 10 À6 M. The variation of scan rate study shows that the system undergoes diffusion-controlled process. Diffusion coefficient and rate constant of methionine were determined using hydrodynamic method (rotating disk electrode) with values of 1.11 Â 10 À5 cm 2 s À1 and 0.0026 cm s À1 respectively for unmodified electrode while the values of diffusion coefficient and rate constant of methionine using C 60 modified Au electrode are 5.7 Â 10 À6 cm 2 s À1 and 0.0021 cm s À1 respectively.

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“…As a further significant step, we used the C 60 -MWCNT nanocomposite film to modify a glassy carbon (GC) electrode and studied extensively the direct electrochemical behavior of Hb on this surface-modified electrode in aqueous solutions. [25,26] This paper reports the main results of these investigations, including 1) an increase by one order Abstract: The direct electrochemistry of hemoglobin (Hb) was studied in a novel all-carbon nanocomposite film of C 60 -MWCNT (MWCNT = multiplewalled carbon nanotube) and compared with that in bare MWCNT film. The heterogeneous electron-transfer rate constant k s of Hb/C 60 -MWCNT was determined to be 0.39 s…”

mentioning

confidence: 99%

Significantly Accelerated Direct Electron‐Transfer Kinetics of Hemoglobin in a C₆₀‐MWCNT Nanocomposite Film

Zhang

Fan

Yang

2006

Chemistry A European J

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The direct electrochemistry of hemoglobin (Hb) was studied in a novel all-carbon nanocomposite film of C(60)-MWCNT (MWCNT=multiple-walled carbon nanotube) and compared with that in bare MWCNT film. The heterogeneous electron-transfer rate constant k(s) of Hb/C(60)-MWCNT was determined to be 0.39 s(-1), which is more than one order of magnitude greater than that of Hb/MWCNT (0.03 s(-1)). The significantly accelerated electron-transfer kinetics are attributed to the mediator role played by C(60), which is finely dispersed on the MWCNT surfaces. The excellent stability of Hb/C(60)-MWCNT was established and its potential application towards the electrocatalytic reduction of O(2) was demonstrated.

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Fullerene film electrodes in aqueous solutions Part 2. Effects of doping cations

Cited by 69 publications

References 12 publications

Voltammetric Determination of 2′‐Deoxyadenosine and Adenine in Urine of Patients with Hepatocellular Carcinoma Using Fullerene‐C₆₀‐modified Glassy Carbon Electrode

Voltammetric Determination of 2′‐Deoxyadenosine and Adenine in Urine of Patients with Hepatocellular Carcinoma Using Fullerene‐C₆₀‐modified Glassy Carbon Electrode

Electrochemical Oxidation of Methionine Mediated by a Fullerene‐C₆₀ Modified Gold Electrode

Significantly Accelerated Direct Electron‐Transfer Kinetics of Hemoglobin in a C₆₀‐MWCNT Nanocomposite Film

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Fullerene film electrodes in aqueous solutions Part 2. Effects of doping cations

Cited by 69 publications

References 12 publications

Voltammetric Determination of 2′‐Deoxyadenosine and Adenine in Urine of Patients with Hepatocellular Carcinoma Using Fullerene‐C60‐modified Glassy Carbon Electrode

Voltammetric Determination of 2′‐Deoxyadenosine and Adenine in Urine of Patients with Hepatocellular Carcinoma Using Fullerene‐C60‐modified Glassy Carbon Electrode

Electrochemical Oxidation of Methionine Mediated by a Fullerene‐C60 Modified Gold Electrode

Significantly Accelerated Direct Electron‐Transfer Kinetics of Hemoglobin in a C60‐MWCNT Nanocomposite Film

Contact Info

Product

Resources

About

Voltammetric Determination of 2′‐Deoxyadenosine and Adenine in Urine of Patients with Hepatocellular Carcinoma Using Fullerene‐C₆₀‐modified Glassy Carbon Electrode

Voltammetric Determination of 2′‐Deoxyadenosine and Adenine in Urine of Patients with Hepatocellular Carcinoma Using Fullerene‐C₆₀‐modified Glassy Carbon Electrode

Electrochemical Oxidation of Methionine Mediated by a Fullerene‐C₆₀ Modified Gold Electrode

Significantly Accelerated Direct Electron‐Transfer Kinetics of Hemoglobin in a C₆₀‐MWCNT Nanocomposite Film