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

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


Alicja Stankiewicz

Lourdes S. M. Alwis


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.

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
Keywords graphene oxide; fibre optic; pH; sensing; FBG; roughness; surface functionalisation; wettability; GO; biomedical application
Public URL
Contract Date Dec 7, 2018


Proceedings-02-00789 (429 Kb)

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Copyright Statement
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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