Self-powered ultrasensitive pulse sensors for noninvasive multi-indicators cardiovascular monitoring

Imperceptible energy harvesting device and biomedical sensor based on ultraflexible ferroelectric transducers and organic diodes

“…The authors are aware that there exist many different sensor technologies to measure the human pulse wave, ranging from optic 57 , 58 over ultrasonic 59 to force 20 , 54 , 55 , 60 – 65 sensing approaches. The force-sensing approaches make use of piezoresistive 60 , 61 , piezoelectric 54 , 55 or triboelectric 62 effects, or of capacitive changes 20 , 63 – 65 . Many of those devices are impressive with respect to their high sensitivity and ultrafast response time; for instance, Yao et al recently reported a piezoresistive sensor with an impressive sensitivity >10 7 Ω kPa −1 and a fast response time of 1.6 ms 60 .…”

Flexible pressure sensors via engineering microstructures for wearable human-machine interaction and health monitoring applications

“…Finally, the continuous blood pressure was able to be estimated based on the pulse transit time according to the Moens-Korteweg's formula. Thus, a continuous, non-invasive, and cuff-less blood pressure monitoring approach was realized, which is potentially crucial for early diagnosis and prevention of cardiovascular diseases (Xu et al, 2021).…”

Micro‐Nano Processing of Active Layers in Flexible Tactile Sensors via Template Methods: A Review

“…As discussed previously, the introduction of micro-nano structure improves the performance of TENGs and research has been demonstrated that it can also enhance the sensing performance of triboelectric tactile sensors. [111,112,35] For instance, Zhang et al [113] proposed a self-powered ultrasensitive pulse sensor (SUPS) based on TENGs for noninvasive multi-indicator cardiovascular monitoring. Benefiting from the synergistic engineering of the material surface pattern and the device structure, the developed SUPS has excellent sensing performance, such as ultrasensitivity of 10.29 nA kPa −1 , response time of 30 ms, and low detection limit of 5 mg.…”