Composite Microneedle Arrays Modified With Palladium Nanoclusters for Electrocatalytic Detection of Peroxide
| Autor: | Thomas Dooher, Catherine Hegarty, James Davis, Stephen McKillop, Dorian Dixon |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
education.field_of_study
Materials science Inorganic chemistry Population chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Peroxide 0104 chemical sciences Nanoclusters chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Electrode Polystyrene Electrical and Electronic Engineering Cyclic voltammetry 0210 nano-technology education Instrumentation Palladium |
| Zdroj: | IEEE Sensors Letters. 3:1-4 |
| ISSN: | 2475-1472 |
| DOI: | 10.1109/lsens.2019.2935831 |
| Popis: | The fabrication of conductive composite microneedle (MN) patches modified with palladium clusters for the electrocatalytic detection of peroxide is described in this letter. Micromolding techniques are utilized in which carbon nanoparticles are bound within a polystyrene matrix resulting in the production of a 10 × 10 array of needles of length 700 μm. Electrochemical anodization of the carbon particles increases the interfacial carboxyl group population which facilitates the capture of Pd 2+ ions. Their subsequent electroreduction yields a catalytic interface with a high sensitivity toward the electroreduction of peroxide (-0.3 V:49.7+/-2.8 μA·mM -1 ·cm -2 ; -0.5 V:102.1+/-2.32 μA·mM -1 ·cm -2 ). The MN sensing system and the various modification stages has been characterized using mechanical testing (fracture testing), cyclic voltammetry, and high-resolution X-ray photoelectron spectroscopy. |
| Databáze: | OpenAIRE |
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