Carotid artery monitoring patch using a supercapacitive pressure sensor with piezoelectricity

Kirigami-Inspired, Three-Dimensional Piezoelectric Pressure Sensors Assembled by Compressive Buckling

“…Although the measurement positions are different, the signal change cycle is the same, indicating that the signals measured in different parts are indeed human pulse signals. The shape and detailed parameters of the pulse signals from different locations correspond well to those reported in the literature, validating the measurement results 53,54 . In the future, through integration with various external devices, sensors can be employed to monitor a broader range of physiological signals in the human body, such as blood pressure 55 , and respiratory rate 56 .…”

Recent Advances in Materials, Devices and Algorithms Toward Wearable Continuous Blood Pressure Monitoring

“…In addition, piezoelectric materials were also incorporated with other sensing systems for sensitive PW monitoring. For example, Kil et al 189 developed a pressure sensor using P(VDF-TrFE) and a supercapacitor for carotid artery monitoring, while Chen et al 190 combined PbTiO 3 nanowires and graphene to create a piezoelectric-induced pressure sensor with high sensitivity and a fast response time. These sensors reliably capture pulse waveforms, detect cardiovascular diseaserelated differences, and overcome the challenge of measuring static pressure.…”

Bioinspired Low Hysteresis Flexible Pressure Sensor Using Nanocomposites of Multiwalled Carbon Nanotubes, Silicone Rubber, and Carbon Nanofiber for Human–Computer Interaction

“…This has spurred a focused and heightened interest in the development of flexible sensors customized for temperature, 1,2 pressure, 3,4 strain, 5,6 humidity, 7,8 gas, 9,10 monitoring applications, and other fields. Among them, flexible pressure sensors have been widely studied due to their good application prospects in the field of electronic skin (e-skin), 11,12 wearable electronics, 13,14 intelligent robotics, 15,16 human body movement monitoring, 17,18 and human−computer interaction. 19,20 Depending on the sensing principle and output signal, flexible pressure sensors can be classified as piezoresistive, 21,22 capacitive, 23,24 piezoelectric, 25,26 and friction electric.…”

“…This has spurred a focused and heightened interest in the development of flexible sensors customized for temperature, , pressure, , strain, , humidity, , gas, , monitoring applications, and other fields. Among them, flexible pressure sensors have been widely studied due to their good application prospects in the field of electronic skin (e-skin), , wearable electronics, , intelligent robotics, , human body movement monitoring, , and human–computer interaction. , Depending on the sensing principle and output signal, flexible pressure sensors can be classified as piezoresistive, , capacitive, , piezoelectric, , and friction electric. , Within this category of sensors, the principle of a flexible piezoresistive sensor is to convert an external mechanical pressure stimulus applied to the device into a recordable change in resistance signal, which consists of the contact resistance at the interface between the electrode and the sensing material and the internal resistance of the sensing material and the electrode. , The material’s resistance can be expressed by the following formula: R = ρ L / S , where R is the resistance of the material, ρ is the resistivity, L is the length, and S is the cross-sectional area. , Flexible piezoresistive sensors have garnered widespread attention and thorough examination owing to their inherent advantages, notably low manufacturing costs and uncomplicated structures.…”