7.2.6 IrOx and Pt-Ir Electrochemical Sensors: Prospective Enzyme-less pH and Glucose Sensors for Continuous Monitoring in Cell Culture

Yueh-Yuan Fang, Chii-Wann Lin & Yi-Cheng Hsieh
This study reports the development of two enzyme-less biosensors by using IrOx for pH and Pt-Ir for glucose sensors. Nanostructures of electrodeposited IrOx and Pt-Ir were examined by SEM and XPS on the electrode surfaces. We used chronopotentiometry (CP) for pH and linear sweep voltammetry (LSV) for glucose measurement at 37 °C in 1X PBS (0.15M NaCl). In the physiological range of pH 4-10 and glucose concentration 1 mM-12 mM, these two biosensors exhibited good...