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

Proceedings

Stankiewicz, Alicja¹  Alwis, Lourdes S. M.²  Binetti, Leonardo³ 

[1] Author to whom correspondence should be addressed.;Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018.;School of Engineering and the Built Environment, Edinburgh Napier University, Edinburgh EH10 5DT, UK

关键词: graphene oxide;    fibre optic;    pH;    sensing;    FBG;    roughness;    surface functionalisation;    wettability;    GO;    biomedical application;   

DOI  :  10.3390/proceedings2130789

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY