Carbon nanotubes paste electrodes as new detectors for capillary electrophoresis

Chicharro, Manuel; Sánchez, A.S. Salinas; Bermejo, Esperanza; Zapardiel, Antonio; Rubianes, María D.; Rivas, Gustavo A.

doi:10.1016/j.aca.2005.04.031

Cited by 77 publications

(34 citation statements)

References 16 publications

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“…In addition, special attention has been paid to the possibilities of carbon nanotube paste (CNTP)-based electrodes in electrochemical investigations and in modern electroanalysis. Rivas group [16][17][18][19][20][21] has reported on the advantages of CNTP electrode on the electrochemical behavior of different redox systems based on the use of CNTs dispersed in a mineral oil: dopamine, ascorbic acid, dopac and uric acid as well as hydrogen peroxide; 16 guanine, adenine and nucleic acids; 17 phenol, catechol, NADH and hydroquinone; 18 epinephrine and norepinephrine; 19 and glucose. 20 Wang et al reported the use of CNTP electrode for the oxidation of hemocysteine.…”

Section: Introductionmentioning

confidence: 99%

Electroanalytical Applications Based on Carbon Nanotube/Prussian Blue Screen-printable Composite

Shim¹,

Lee²,

Sig³

et al. 2010

Bulletin of the Korean Chemical Society

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A single step fabrication process of carbon nanotube/Prussian Blue (CNT/PB) paste electrodes based on screen printing technology has been studied as an amperometric sensor for the determination of hydrogen peroxide and free chlorine. Compared to the classical carbon paste (CP) electrode, the CNT paste electrode greatly enhanced the response in the presence of hydrogen peroxide due to the electrocatalytic activity of the CNT. Based on the CNT/binder paste, PB was also incorporated into a network of CNT paste and characterized. The best electroanalytical properties of PB-mixed sensors to hydrogen peroxide were obtained with PB ratio of 10 wt % composition, which showed fast response time (t90 ≤ 5 s; 0.2 -0.3 mM), low detection limit of 1.0 µM, good linear response in the range from 5.0 × 10 -5 -1.0 × 10 -3 mol L -1 (r 2 = 0.9998), and high sensitivity of -8.21 µA mM -1 . In order to confirm the enhanced electrochemical properties of CNT/PB electrode, the sensor was further applied for the determination of chlorine in water, which exhibited a linear response behavior in the range of 50 -2000 ppb for chlorine with a slope of 1.10 µA ppm -1 (r 2 = 9971).

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Section: Introductionmentioning

confidence: 99%

Electroanalytical Applications Based on Carbon Nanotube/Prussian Blue Screen-printable Composite

Shim¹,

Lee²,

Sig³

et al. 2010

Bulletin of the Korean Chemical Society

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“…The incorporation within composite matrices using binders like bromoform [4] and Teflon [9] has demonstrated to be highly successful. We have reported the excellent properties of a composite electrode obtained by dispersion of multiwall carbon nanotubes within mineral oil [10,11], called carbon nanotubes paste electrode (CNTPE), as detector, either in batch or in flow systems [12].…”

Section: Introductionmentioning

confidence: 99%

Amperometric Response of Hydrogen Peroxide at Carbon Nanotubes Paste Electrodes Modified with an Electrogenerated Poly(Fe(III)‐5‐amino‐phenantroline). Analytical Applications for Glucose Biosensing

et al. 2009

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This work reports the catalytic activity of a polymer electrogenerated from Fe(III)-5-amino-1,10-phenantroline solution at a carbon nanotubes paste electrode (CNTPE) towards the oxidation and mainly the reduction of hydrogen peroxide. The important role of carbon nanotubes on the generation of poly(Fe(III)-5-amino-1,10-phenantroline) is demonstrated through the comparison with the behavior of graphite paste electrode (CPE). The polymer electrogenerated at CNTPE largely improves the amperometric detection of hydrogen peroxide at À 0.100 V. The analytical application of the resulting electrode is demonstrated in connection with the design of a glucose biosensor based on the deposition of GOx and diluted Nafion on the top of the polymer-modified CNTPE. The quantification of glucose in human serum samples showed a good correlation with the values obtained by the spectrophotometric technique.

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“…[6,11] The present CNT/PMMA composite electrode shows lownoise characteristics and a stable baseline, which is not always the case for other CNT electrodes in CE or micro- www.chemeurj.org chip CE, such as CNT-coated electrodes [11,43] and CNT-paste electrodes. [16,44] The present CNT/PMMA electrode has a significant advantage over these other CNT electrodes because it is rigid and stable and is not prone to wearing over time. Its low noise level may be attributed to the stable and rigid conductive network of the CNT/PMMA composite.…”

mentioning

confidence: 98%

Carbon Nanotube/Poly(methyl methacrylate) (CNT/PMMA) Composite Electrode Fabricated by In Situ Polymerization for Microchip Capillary Electrophoresis

Yao¹,

Wu²,

Wang³

et al. 2007

Chemistry A European J

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We describe the development and application of a novel carbon nanotube/poly(methyl methacrylate) (CNT/PMMA) composite electrode as a sensitive amperometric detector of microchip capillary electrophoresis (CE). The composite electrode was fabricated by the in situ polymerization of a mixture of CNTs and prepolymerized methyl methacrylate in the microchannel of a piece of fused silica capillary under heat. The performance of this unique system was demonstrated by the separation and detection of phenolic pollutants and purines. The new CNT-based CE detector offered significantly lower operating potentials, yielded substantially enhanced signal-to-noise characteristics, and exhibited resistance to surface fouling and, hence, enhanced stability. Long-term stability and reproducibility with relative standard deviations of less than 5 % for the peak current (n=20) were also demonstrated. The simplicity and significant performance exhibited by the CNT/PMMA composite electrode indicate great promise for conventional CE, flowing-injection analysis, and other microfluidic analysis systems.

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Carbon nanotubes paste electrodes as new detectors for capillary electrophoresis

Cited by 77 publications

References 16 publications

Electroanalytical Applications Based on Carbon Nanotube/Prussian Blue Screen-printable Composite

Electroanalytical Applications Based on Carbon Nanotube/Prussian Blue Screen-printable Composite

Amperometric Response of Hydrogen Peroxide at Carbon Nanotubes Paste Electrodes Modified with an Electrogenerated Poly(Fe(III)‐5‐amino‐phenantroline). Analytical Applications for Glucose Biosensing

Carbon Nanotube/Poly(methyl methacrylate) (CNT/PMMA) Composite Electrode Fabricated by In Situ Polymerization for Microchip Capillary Electrophoresis

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