City Research Online

Dual pO₂/pCO₂ fibre optic sensing film

Davenport, J. J., Hickey, M., Phillips, J. P. & Kyriacou, P. A. (2017). Dual pO₂/pCO₂ fibre optic sensing film. The Analyst, 142(10), pp. 1711-1719. doi: 10.1039/c7an00173h


A fibre optic multi-sensor has been developed for biomedical sensing applications using a tip coating solution sensitive to both oxygen and carbon dioxide. An oxygen sensitive phosphorescence quenching complex based on platinum octaethylporphyrin (PtOEP) was combined with a carbon dioxide sensitive phosphorescence compound based on 8-hydroxypyrene-1,3,6-trisulfonic acid trisodium salt (HPTS). When excited by blue light (470 nm), the resultant coating had two fluorescent peaks at 515 nm (green) and 645 nm (red) which responded to partial pressure of CO2 and O2 respectively. The sensor was tested in vitro and shown to be able to measure CO2 and O2 simultaneously and in real time, with calibration constants of 0.0384 kPa−1 and 0.309 kPa−1 respectively. The O2 sensitive peak received some overlap from the 515 nm peak (0.38% of peak intensity) as well as some cross-sensitivity (maximum, 5.1 kPa pCO2 gave a measurement equivalent to 0.43 kPa of O2, a ratio of 0.08 : 1). However, these effects can be subtracted from measurements and no significant cross-sensitivity or overlap was seen in CO2 measurements from O2. This novel compound presents great potential for use in medical sensors and we expect it to be important to a wide range of future applications.

Publication Type: Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Departments: School of Science & Technology > Engineering
SWORD Depositor:
[thumbnail of CRO 2017 J Davenport, M Hickey, JP Phillips and PA Kyriacou. Dual pO2  pCO2 fibre optic sensing film for biomedical applications. Analyst, 142,1711-1719.pdf]
Text - Accepted Version
Download (1MB) | Preview


Add to AnyAdd to TwitterAdd to FacebookAdd to LinkedinAdd to PinterestAdd to Email


Downloads per month over past year

View more statistics

Actions (login required)

Admin Login Admin Login