Composite Microneedle Arrays Modified With Palladium Nanoclusters forElectrocatalytic Detection of Peroxide

J Davis; Catherine Hegarty; D Dixon; Thomas Dooher; Stephen McKillop

doi:10.1109/LSENS.2019.2935831

Composite Microneedle Arrays Modified With Palladium Nanoclusters forElectrocatalytic Detection of Peroxide

J Davis, Catherine Hegarty, D Dixon, Thomas Dooher, Stephen McKillop

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Abstract

The fabrication of conductive composite microneedle (MN) patches modified with palladium clusters for theelectrocatalytic detection of peroxide is described in this letter. Micromolding techniques are utilized in which carbonnanoparticles are bound within a polystyrene matrix resulting in the production of a 10×10 array of needles of length700μm. Electrochemical anodization of the carbon particles increases the interfacial carboxyl group population whichfacilitates the capture of Pd2+ions. Their subsequent electroreduction yields a catalytic interface with a high sensitivitytoward the electroreduction of peroxide (−0.3 V:49.7+/–2.8μA·mM–1·cm–2; –0.5 V:102.1+/–2.32μA·mM–1·cm–2). The MNsensing system and the various modification stages has been characterized using mechanical testing (fracture testing),cyclic voltammetry, and high-resolution X-ray photoelectron spectroscop

Original language	English
Article number	4500904
Number of pages	4
Journal	IEEE Sensors Letters
Early online date	21 Aug 2019
DOIs	https://doi.org/10.1109/LSENS.2019.2935831
Publication status	Published (in print/issue) - 24 Sept 2019

Keywords

microneedle
palladium
peroxide
sensor
electrode
composite

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10.1109/LSENS.2019.2935831

190814 Hegarty Microneedle Pd Sensors Letters FinalAuthor Accepted Manuscript, 531 KB

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title = "Composite Microneedle Arrays Modified With Palladium Nanoclusters forElectrocatalytic Detection of Peroxide",

abstract = "The fabrication of conductive composite microneedle (MN) patches modified with palladium clusters for theelectrocatalytic detection of peroxide is described in this letter. Micromolding techniques are utilized in which carbonnanoparticles are bound within a polystyrene matrix resulting in the production of a 10×10 array of needles of length700μm. Electrochemical anodization of the carbon particles increases the interfacial carboxyl group population whichfacilitates the capture of Pd2+ions. Their subsequent electroreduction yields a catalytic interface with a high sensitivitytoward the electroreduction of peroxide (−0.3 V:49.7+/–2.8μA·mM–1·cm–2; –0.5 V:102.1+/–2.32μA·mM–1·cm–2). The MNsensing system and the various modification stages has been characterized using mechanical testing (fracture testing),cyclic voltammetry, and high-resolution X-ray photoelectron spectroscop",

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AU - Davis, J

AU - Hegarty, Catherine

AU - Dixon, D

AU - Dooher, Thomas

AU - McKillop, Stephen

PY - 2019/9/24

Y1 - 2019/9/24

N2 - The fabrication of conductive composite microneedle (MN) patches modified with palladium clusters for theelectrocatalytic detection of peroxide is described in this letter. Micromolding techniques are utilized in which carbonnanoparticles are bound within a polystyrene matrix resulting in the production of a 10×10 array of needles of length700μm. Electrochemical anodization of the carbon particles increases the interfacial carboxyl group population whichfacilitates the capture of Pd2+ions. Their subsequent electroreduction yields a catalytic interface with a high sensitivitytoward the electroreduction of peroxide (−0.3 V:49.7+/–2.8μA·mM–1·cm–2; –0.5 V:102.1+/–2.32μA·mM–1·cm–2). The MNsensing system and the various modification stages has been characterized using mechanical testing (fracture testing),cyclic voltammetry, and high-resolution X-ray photoelectron spectroscop

AB - The fabrication of conductive composite microneedle (MN) patches modified with palladium clusters for theelectrocatalytic detection of peroxide is described in this letter. Micromolding techniques are utilized in which carbonnanoparticles are bound within a polystyrene matrix resulting in the production of a 10×10 array of needles of length700μm. Electrochemical anodization of the carbon particles increases the interfacial carboxyl group population whichfacilitates the capture of Pd2+ions. Their subsequent electroreduction yields a catalytic interface with a high sensitivitytoward the electroreduction of peroxide (−0.3 V:49.7+/–2.8μA·mM–1·cm–2; –0.5 V:102.1+/–2.32μA·mM–1·cm–2). The MNsensing system and the various modification stages has been characterized using mechanical testing (fracture testing),cyclic voltammetry, and high-resolution X-ray photoelectron spectroscop

KW - microneedle

KW - palladium

KW - peroxide

KW - sensor

KW - electrode

KW - composite

UR - https://ieeexplore.ieee.org/document/8809207

U2 - 10.1109/LSENS.2019.2935831

DO - 10.1109/LSENS.2019.2935831

M3 - Article

SN - 2475-1472

JO - IEEE Sensors Letters

JF - IEEE Sensors Letters

M1 - 4500904

ER -

Composite Microneedle Arrays Modified With Palladium Nanoclusters forElectrocatalytic Detection of Peroxide

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Keywords

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