The sensor’s contact registers reactions, occurring on the surface of the sensor. The sensor surface acts as a catalytic material, at which oxidation or reduction reactions of the analyte (or intermediate products) are occuring. Such sensors are often reusable and while residual reaction products are oxides, already present in the product.
We develop and test these sensors to measure various bio-active compounds in liquids. We currently have working graphene based sensors for ascorbate (vit C) and glucose.
Tested materials:
Graphene oxide, Au, Pt, glassy carbon electrode, composite electrodes bare and modified with different films and species. We also employ monolayer coatings, namely graphene.
Our examples:
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- Patterned graphene composite as electrode substrate
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- Cyclic voltammograms for different ascorbate concentrations at glassy carbon electrode modified with graphene layer
