Electrochemical Investigation of Glucose Sensor Fabricated at Copper-Plated Screen-Printed Carbon Electrodes

Controlled reaction kinetics of the bio-catalytic system of microperoxidase-11 and hydrogen peroxide has been achieved using an electrostatic technique. The technique allowed independent control of 1) the thermodynamics of the system using electrochemical setup and 2) the quantum mechanical tunneling at the interface between microperoxidase-11 and the working electrode by applying a gating voltage to the electrode. The cathodic currents of electrodes immobilized with microperoxidase-11 showed a dependence on the gating voltage in the presence of hydrogen peroxide, indicating a controllable reduction reaction. The measured kinetic parameters of the bio-catalytic reduction showed nonlinear dependences on the gating voltage as the result of modified interfacial electron tunnel due to the field induced at the microperoxidase-11-electrode interface. Our results indicate that the kinetics of the reduction of hydrogen peroxide can be controlled by a gating voltage and illustrate the operation of a field-effect bio-catalytic transistor, whose currentgenerating mechanism is the conversion of hydrogen peroxide to water with the current being controlled by the gating voltage. Copyright 2011 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License.

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“…39 A low K m indicates high bio-catalytic efficiency of MP-11. 39 The Lineweaver-Burk (LB) equation relates I p,r , k cat and K m as, 40 …”

Section: Field-controlled Reaction Kinetics Of the Electro-reductimentioning

confidence: 99%

Field-controlled electron transfer and reaction kinetics of the biological catalytic system of microperoxidase-11 and hydrogen peroxide

Choi

Yau

2011

AIP Advances

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“…[1][2][3][4][5] Such electrode systems allow laboratory developed experiments to be translated into the eld allowing for reproducible and disposable on-site detection of analytes. [1][2][3][4][5] Such electrode systems allow laboratory developed experiments to be translated into the eld allowing for reproducible and disposable on-site detection of analytes.…”

Section: Introductionmentioning

confidence: 99%

Exploring the electrical wiring of screen-printed configurations utilised in electroanalysis

et al. 2015

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In this technical note the often overlooked issue of electrically connecting screen-printed electrode sensors is considered. The electrical connection of screen-printed electrodes to the potentiostat/ electronics can be a main issue when a true electrochemical response is trying to be obtained and if one does not have a stable electrical connection, the results that are obtained may lack reproducibility and therefore maybe discredited as "another failed electrochemical probe/analyte". This paper considers the case of electrically connecting screen-printed with crocodile clips and compares that to the use of edge-connectors demonstrating the precise connection of an electrode setup when utilising crocodile clips can result in extremely reproducible electrochemical outputs when applied correctly.

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“…This was attributed to a unique CuO/Cu 2 O redox catalyst mechanism [131]. Copper nanoparticle-modified electrodes have also been used in the detection of nitrate [130,132], amikacin [133], hydrogen peroxide [134], nitrite [135,138], oxygen [146], glucose [147,148], and various catechol derivatives [149].…”

Section: Copper Nanoparticlesmentioning

confidence: 99%

Metal Nanoparticles: Applications in Electroanalysis

Lawrence

Liang

2008

Nanostructured Materials in Electrochemistry

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Electrochemical Investigation of Glucose Sensor Fabricated at Copper-Plated Screen-Printed Carbon Electrodes

Cited by 63 publications

References 13 publications

Field-controlled electron transfer and reaction kinetics of the biological catalytic system of microperoxidase-11 and hydrogen peroxide

Field-controlled electron transfer and reaction kinetics of the biological catalytic system of microperoxidase-11 and hydrogen peroxide

Exploring the electrical wiring of screen-printed configurations utilised in electroanalysis

Metal Nanoparticles: Applications in Electroanalysis

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