Graphene-Oxide and Hydrogel Coated FBG-Based pH Sensor for Biomedical Applications

Binetti, Leonardo; Stankiewicz, Alicja; Alwis, Lourdes S. M.

Abstract

A hydrogel coated fibre grating-based pH sensor for biomedical applications has been realised, where Graphene Oxide (GO) had been used to enhance the bonding between the coating and the fibre. Two methods of deposition of GO were analysed i.e., evaporation and co-electroplating. The paper concludes that the system of GO evaporated on the fibre + the hydrogel has a sensitivity much higher, (6.1 ± 0.5) pm/pH, than the system of Cu and GO co-electroplated + the hydrogel, (1.9 ± 0.1) pm/pH, for a pH range between 2 to 10. The other conclusion is that the first system has a less coating bonding energy with the optical fibre whereas the second system has a stronger bonding energy, with better durability.

Citation

Binetti, L., Stankiewicz, A., & Alwis, L. S. M. (2018, September). Graphene-Oxide and Hydrogel Coated FBG-Based pH Sensor for Biomedical Applications. Presented at Eurosensors 2018 Conference, Graz, Austria

• Presentation Conference Type: Conference Paper (published)
• Conference Name: Eurosensors 2018 Conference
• Start Date: Sep 9, 2018
• End Date: Sep 12, 2018
• Acceptance Date: Nov 20, 2018
• Online Publication Date: Dec 3, 2018
• Publication Date: Dec 3, 2018
• Deposit Date: Dec 7, 2018
• Publicly Available Date: Dec 7, 2018
• Journal: Proceedings
• Print ISSN: 0035-9211
• Publisher: Royal Society of Victoria
• Peer Reviewed: Peer Reviewed
• Volume: 2
• Issue: 13
• Pages: 789
• DOI: https://doi.org/10.3390/proceedings2130789
• Keywords: graphene oxide; fibre optic; pH; sensing; FBG; roughness; surface functionalisation; wettability; GO; biomedical application
• Public URL: http://researchrepository.napier.ac.uk/Output/1410538
• Contract Date: Dec 7, 2018