1 Introduction Wearable electronics for electrophysiological signal monitoring offer promising capabilities for continuous, real-time healthcare and performance monitoring [1-4]. Accurate acquisition of electrophysiological signals, such as electrocardiography (ECG) [5], electromyography [6], and electroencephalography [7, 8] depends significantly on seamless interfacial integration across multiple interfaces: skin-electrode, electrode-connector, and skin-connector.