Visible laser scribing fabrication of porous graphitic carbon electrodes: Morphology, electrochemical properties and applications as disposable sensor platform
| dc.check.date | 2021-09-23 | |
| dc.check.info | Access to this article is restricted until 12 months after publication by request of the publisher. | en |
| 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.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.date.accessioned | 2020-09-30T11:42:42Z | |
| dc.date.available | 2020-09-30T11:42:42Z | |
| dc.date.issued | 2020-09-23 | |
| dc.date.updated | 2020-09-30T11:25:53Z | |
| 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.description.status | Peer reviewed | en |
| dc.description.version | Accepted Version | en |
| dc.format.mimetype | application/pdf | en |
| 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.doi | 10.1021/acsaelm.0c00612 | en |
| dc.identifier.issn | 2637-6113 | |
| dc.identifier.journaltitle | ACS Applied Electronic Materials | en |
| dc.identifier.uri | https://hdl.handle.net/10468/10610 | |
| dc.language.iso | en | en |
| dc.publisher | ACS Publications | 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 |
| 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 |
