e-journal
An Electrochemical Microbubble-Based MEMS Pressure Sensor
Abstract—A novel pressure transducer concept is introduced in which external pressure variations induce changes in the volume of a trapped microbubble (μB) in an electrolyte solution. These volumetric changes are monitored by electrochemical impedance-based measurements and may be used for pressure
tracking applications. Microbubbles are nucleated on-demand by electrolysis within a confinement chamber with high precision (measured size RSD ∼1%). This pressure transducer concept was developed specifically for operation in liquid environments and features biocompatible construction, small footprint (
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