Fabrication of new single-walled carbon nanotubes microelectrode for electrochemical sensors application

Viết, Nguyễn Xuân; Ukita, Yoshiaki; Chikae, Miyuki; Ohno, Yasuhide; Maehashi, Kenzo; Matsumoto, Kazuhiko; Viet, Pham Hung; Takamura, Yuzuru

doi:10.1016/j.talanta.2012.01.023

Cited by 20 publications

(14 citation statements)

References 29 publications

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“…Carbonaceous materials are among the most interesting transducers that convert a biological recognition process into a measurable electroanalytical signal for biosensors development [9,10]. In recent years, carbon nanotubes, and multiwalled (MWCNTs) in particular, have received great attention as nanomaterials [11][12][13]. Their main advantages are enhanced electron transfer rate, excellent electrical conductivity, reduced electrode surface fouling, high mechanical strength and good stability while lowering the over potential of analytes [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Biosensor based on multi-walled carbon nanotubes paste electrode modified with laccase for pirimicarb pesticide quantification

Oliveira

Barroso

Lima‐Neto

et al. 2013

Talanta

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This study focused on the development of a sensitive enzymatic biosensor for the determination of pirimicarb pesticide based on the immobilization of laccase on composite carbon paste electrodes. Multi-walled carbon nanotubes (MWCNTs) paste electrode modified by dispersion of laccase (3%, w/w) within the optimum composite matrix (60:40%, w/w, MWCNTs and paraffin binder) showed the best performance, with excellent electron transfer kinetic and catalytic effects related to the redox process of the substrate 4-aminophenol. No metal or anti-interference membrane was added. Based on the inhibition of laccase activity, pirimicarb can be determined in the range 9.90 × 10(-7) to 1.15 × 10(-5) mol L(-1) using 4-aminophenol as substrate at the optimum pH of 5.0, with acceptable repeatability and reproducibility (relative standard deviations lower than 5%). The limit of detection obtained was 1.8 × 10(-7) mol L(-1) (0.04 mg kg(-1) on a fresh weight vegetable basis). The high activity and catalytic properties of the laccase-based biosensor are retained during ca. one month. The optimized electroanalytical protocol coupled to the QuEChERS methodology were applied to tomato and lettuce samples spiked at three levels; recoveries ranging from 91.0 ± 0.1% to 101.0 ± 0.3% were attained. No significant effects in the pirimicarb electroanalysis were observed by the presence of pro-vitamin A, vitamins B1 and C, and glucose in the vegetable extracts. The proposed biosensor-based pesticide residue methodology fulfills all requisites to be used in implementation of food safety programs.

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Section: Introductionmentioning

confidence: 99%

“…MWCNTs still need to be further explored due to their tremendous potential to improve the sensitivity and efficiency of biosensors for carbamates detection [9][10][11][12][13][14]. Few reports concerning the PMB electrochemical determination were found [15][16][17][18], none regarding detection by MWCNTs-based biosensors.…”

Section: Introductionmentioning

confidence: 99%

Biosensor based on multi-walled carbon nanotubes paste electrode modified with laccase for pirimicarb pesticide quantification

Oliveira

Barroso

Lima‐Neto

et al. 2013

Talanta

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“…The electrode electron transfer rate k 0 is defined as [33]:

k_{0} = RT / n^{2} F^{2} {SR}_{T} C_{0}

where R is the universal gas constant, T the absolute temperature (K), S the surface area of the electrode (cm 2 ), F Faraday's constant (96,500 C mol −1 ), R T the electron transfer resistance of the electrode (ohm), C 0 the concentration of redox couple (mol cm −3 ), and n the number of electrons transferred. The limiting current i lim is given by the following equation [34]:

i_{lim} = 4 nrFDC

where n is the number of electrons transferred, r the radius of the electrode, D the diffusion coefficient of Fe(CN) 6 4− , and C the bulk concentration of the species. Unless stated otherwise the potential is given versus an Ag/AgCl reference electrode through the paper.…”

Section: Methodsmentioning

confidence: 99%

Multichannel Boron Doped Nanocrystalline Diamond Ultramicroelectrode Arrays: Design, Fabrication and Characterization

Kiran

Rousseau

Lissorgues

et al. 2012

Sensors

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We report on the fabrication and characterization of an 8 × 8 multichannel Boron Doped Diamond (BDD) ultramicro-electrode array (UMEA). The device combines both the assets of microelectrodes, resulting from conditions in mass transport from the bulk solution toward the electrode, and of BDD's remarkable intrinsic electrochemical properties. The UMEAs were fabricated using an original approach relying on the selective growth of diamond over pre-processed 4 inches silicon substrates. The prepared UMEAs were characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results demonstrated that the electrodes have exhibited a very fast electrode transfer rate (k0) up to 0.05 cm·s−1 (in a fast redox couple) and on average, a steady state limiting current (in a 0.5 M potassium chloride aqueous solution containing 1 mM Fe(CN)64− ion at 100 mV·s−1) of 1.8 nA. The UMEAs are targeted for electrophysiological as well as analytical applications.

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“…Indeed, CNT electrode is driving the electron transfer reaction faster than many other carbon electrodes surfaces observed, with very small apparent activation barrier at the electrode surface [21].…”

Section: Introductionmentioning

confidence: 98%

Impedimetric and stripping voltammetric determination of methamphetamine at gold nanoparticles-multiwalled carbon nanotubes modified screen printed electrode

Rafiee

Fakhari

Ghaffarzadeh

2015

Sensors and Actuators B: Chemical

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Fabrication of new single-walled carbon nanotubes microelectrode for electrochemical sensors application

Cited by 20 publications

References 29 publications

Biosensor based on multi-walled carbon nanotubes paste electrode modified with laccase for pirimicarb pesticide quantification

Biosensor based on multi-walled carbon nanotubes paste electrode modified with laccase for pirimicarb pesticide quantification

Multichannel Boron Doped Nanocrystalline Diamond Ultramicroelectrode Arrays: Design, Fabrication and Characterization

Impedimetric and stripping voltammetric determination of methamphetamine at gold nanoparticles-multiwalled carbon nanotubes modified screen printed electrode

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