Visible laser scribing fabrication of porous graphitic carbon electrodes: Morphology, electrochemical properties and applications as disposable sensor platform

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dc.contributor.author Vaughan, Eoghan
dc.contributor.author Larrigy, Cathal
dc.contributor.author Burke, Micheal
dc.contributor.author Sygellou, Labrini
dc.contributor.author Quinn, Aidan J.
dc.contributor.author Galiotis, Costas
dc.contributor.author Iacopino, Daniela
dc.date.accessioned 2020-09-30T11:42:42Z
dc.date.available 2020-09-30T11:42:42Z
dc.date.issued 2020-09-23
dc.identifier.citation Vaughan, E., Larrigy, C., Burke, M., Sygellou, L., Quinn, A. J., Galiotis, C. and Iacopino, D (2020) 'Visible laser scribing fabrication of porous graphitic carbon electrodes: Morphology, electrochemical properties and applications as disposable sensor platform', ACS Applied Electronic Materials. doi: 10.1021/acsaelm.0c00612 en
dc.identifier.issn 2637-6113
dc.identifier.uri http://hdl.handle.net/10468/10610
dc.identifier.doi 10.1021/acsaelm.0c00612 en
dc.description.abstract Porous graphitic carbon electrodes were fabricated by laser scribing of commercial polyimide tape. The process was performed by a simple one-step procedure using visible wavelength laser irradiation from a low-cost hobbyist laser cutter. The obtained electrodes displayed a highly porous morphology, rich in three-dimensional (3D) interconnected networks and edge planes, suitable for electrochemical sensing applications. Spectral characterization by Raman and XPS spectroscopies revealed a crystalline graphitic carbon structure with high percentage of sp2 carbon bonds. Extensive electrochemical characterization performed with outer sphere [Ru(NH3)6]3+ and inner sphere [Fe(CN)6]4-, Fe2+/3+ and dopamine redox mediators showed quasi-reversible electron transfer at the graphitic carbon surface, mainly dominated by a mass diffusion process. Fast heterogeneous electron-transfer rates, higher than similar carbon-based materials and higher than other graphitic carbon electrodes produced by either visible or infrared laser irradiation, were obtained for these electrodes. Thin-layer transport mechanisms occurring in parallel to the main diffusion-limited mechanism were taken into consideration, but overall the observed enhanced electron-transfer rates effects were ascribed to the large specific surface area of the extended 3D porous network, rich in defects and edge-planes. The superior electrocatalytic properties of the fabricated electrodes allowed electrochemical differentiation between the biomarkers ascorbic acid, dopamine and uric acid in solution. The compatibility of fabricated electrodes with light-weight portable and handheld instrumentation makes such electrodes highly promising for the realisation of low-cost disposable sensing platforms for point-of-care applications. en
dc.description.sponsorship Science Foundation Ireland (16/RC/3918; 16/RC/3835; SFI TIDA 5118) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher ACS Publications en
dc.rights © 2020, American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Electronic Materials, after technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/abs/10.1021/acsaelm.0c00612 en
dc.subject Low-cost disposable sensing platforms en
dc.subject Point-of-care applications en
dc.subject Fabricated electrodes en
dc.subject Porous graphitic carbon electrodes en
dc.title Visible laser scribing fabrication of porous graphitic carbon electrodes: Morphology, electrochemical properties and applications as disposable sensor platform en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Daniela Iacopino, Tyndall Photonics, University College Cork, Cork, Ireland. +353-21-490-3000 Email: daniela.iacopino@tyndall.ie en
dc.internal.availability Full text available en
dc.check.info Access to this article is restricted until 12 months after publication by request of the publisher. en
dc.check.date 2021-09-23
dc.date.updated 2020-09-30T11:25:53Z
dc.description.version Accepted Version en
dc.internal.rssid 538497214
dc.contributor.funder Horizon 2020 en
dc.contributor.funder Science Foundation Ireland en
dc.contributor.funder European Regional Development Fund en
dc.contributor.funder Department of Agriculture, Food and the Marine, Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle ACS Applied Electronic Materials en
dc.internal.copyrightchecked Yes
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress daniela.iacopino@tyndall.ie en
dc.internal.bibliocheck In press. Check vol / issue / page range. Amend citation as necessary. en
dc.relation.project info:eu-repo/grantAgreement/EC/H2020::IA/814496/EU/Active & intelligent PAckaging materials and display cases as a tool for preventive conservation of Cultural Heritage./APACHE en


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