Analysis of the Planar Electrode Morphology for Capacitive Chemical Sensors

Three different electrode structures are compared in this work: conventional interdigitated electrodes (IDE), serpentine electrodes (SRE) and ring-shaped electrodes (RSE). Simulation results and experimental characterization of these electrodes showed that ring-shaped electrodes have a slight capacitance increase per unit of area, thus being more sensitive when used as a capacitive sensor. Furthermore, the ringshaped electrodes are more suitable in process that requires dripping, for better use of the drop distribution. This is the case of liquid substances or sensors with sensitive elements

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