A Paper-Based Iontronic Capacitive Pressure Sensor for Human Muscle Motion Monitoring
Hua Xue, Fan Li, Hongran Zhao, Xiuzhu Lin, Tong Zhang
Abstract
In this study, a flexible capacitive pressure sensor based on filter paper substrate is proposed. The electric double layer (EDL) structure was constructed through the introduction of ionic liquid (IL), and the pressure-sensing was realized by using the change of ion-electron interface contact. The paper-based iontronic pressure sensor possesses a high sensitivity of 221.9 kPa−1, which is hundreds of times higher than that of the capacitive pressure sensors with conventional parallel plate structure, as well as an ultra-low detection limit of 2 Pa. The sensor exhibits an enormous application potential in healthcare wearable electronics and human-machine interface equipment.
Topics & Concepts
Capacitive sensingPressure sensorMaterials scienceSensitivity (control systems)Wearable computerOptoelectronicsInterface (matter)CapacitanceAcousticsElectrical engineeringElectronic engineeringComputer scienceEngineeringElectrodeMechanical engineeringChemistryPhysicsEmbedded systemCapillary numberPhysical chemistryComposite materialCapillary actionAdvanced Sensor and Energy Harvesting MaterialsTactile and Sensory InteractionsAnalytical Chemistry and Sensors