Wearable sensors can help tracking user’s health data such as vital signals or user’s activities and thereby improving the quality of life. These wearable electronics are expected to exhibit flexibility, lightness, ease of adhesion to human skin, and withstand mechanical deformation to provide the necessary comfort and avoid disturbing regular activities. Recovered from the COVID-19 pandemic, the increasing awareness of health monitoring among public has led to an unprecedented need for high performance wearable electronics capable of detecting vital physiological signals or monitor physical activities in real time. Traditional means of monitoring and tracking human motion are being replaced with more efficient, sustainable and smart approaches that wearable and flexible electronics came into increasingly significant roles. Transitioning towards an intelligent society, digitalization has been reforming the ways people interacting with others rapidly. Furthermore, when attached on human body, its unique fibrous and flexible structure offers the tactile sensor to present as a health care monitor in a self-powered manner by translating motions of different movements to electrical signals with various patterns or sequences. Meanwhile, the nanofibrous membrane demonstrated robust tactile sensing performance that the device exhibits durability over 12,000 loading test cycles, holds a fast response time of 82.7 ms, responds to a wide pressure range of 0–5 bar and shows a high relative sensitivity, especially in the small force range of 11.6 V/bar upon pressure applied perpendicular to the surface. The fabricated piezoelectric nanogenerator (PENG) exhibits the high β-phase content and best overall electrical performances, thus selected for the flexible sensing device assembly. Specifically, effects of multi-walled carbon nanotubes (CNT) and barium titanate (BTO) as additives to the fiber morphology as well as mechanical and dielectric properties of the piezoelectric nanofiber membrane were investigated. Herein, a self-powered, porous, flexible, hydrophobic and breathable nanofibrous membrane based on electrospun polyvinylidene fluoride (PVDF) nanofiber has been developed as a tactile sensor with low-cost and simple fabrication for human body motion detection and recognition. However, wearable electronics rely on powering systems to function. Wearable sensors have drawn vast interest for their convenience to be worn on body to monitor and track body movements or exercise activities in real time.
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