Miniaturisation of carbon-based electrochemical pH, oxygen and carbon ​ dioxide sensors for biomedical applications

Miniaturisation of carbon-based electrochemical pH, oxygen and carbon ​ dioxide sensors for biomedical applications

Chemistry

Aiqi Huang

2024

Aiqi Huang

O2 , pH and CO2 are useful indicators of health conditions in human body. Common methods used involve taking body fluids from the patients with needle and syringe which is not only invasive but also time consuming. Furthermore, traditional sensors for O2, CO2 and pH are big and therefore difficult to take in-vivo measurements. Their miniaturized forms also have drawbacks such as fragility and difficult to operate1. The Warwick Electrochemistry and Interfaces group has produced electrodes that have conductive diamond (sp3) form of carbon and non-diamond (sp2) carbon to make sure they are all sensitive to O2 CO2 and pH. 3D printed macro electrodes with the same pH sensitive surface group have also been studied due to their increased affordability and access to the 3D printing technology2. The 3D printed electrodes have been assessed and proved to have high quality in measuring O2,CO2 and pH. Some preliminary experiments have been carried out and future work is ongoing.

Electrochemistry, 3D printed electrodes