In recent years, flexible stress sensors capable of monitoring diverse body movements and physiological signals have been attracting great attention in the fields of healthcare systems, human–machine interfaces, and wearable electronics. Inspired by the structure of natural eggshell inner membrane (ESIM), we developed a pressure sensor based on MXene (Ti3C2Tx)/Ag NWs (silver nanowires) composite electrodes and the micro-structured dielectric layer to meet the application requirements of wide detection range and long-term stability for the sensors. In the light of the nanoscale-microarray of the dielectric layer and the rough surface of electrode materials, this pressure sensor is expected to allow great and persistent deformation during the loading process. As a result, the device is characterized by an improved sensitivity, fast response (in the millisecond range), wide detection range (0–600 kPa), and long-term stability. The outstanding performance of the proposed sensor makes it possible to detect various human activities, such as speaking, air blowing, clenching, walking, finger/knee/elbow bending, and striking, demonstrating its good application prospects in wearable and flexible electronic devices.
A transparent and stretchable strain sensor based on Ag nanowires (NWs) and poly(3,4‐ethylenedioxythiophene):poly(styrene‐sulfonate) (PEDOT:PSS) patterned microstructure is presented. The regular patterns are achieved by a facile replication and transfer process from near‐field electrospun polyacrylonitrile (PAN) grids on the surfaces of polydimethylsiloxane (PDMS) substrates. Owing to the combined advantages for the unique microstructure of sensor, strong adhesion of polymer PEDOT:PSS to underlying layer, and outstanding conductivity of long Ag NWs, the transparent strain sensor possesses the excellent aspects of high sensitivity (gauge factor = 10.2), wide sensing range (0–100%), long‐term reliability for at least 2000 cycles, and distinct temperature responses. Moreover, the patterned strain sensor can be mounted on different body parts to detect a wide range of human movements and temperature responses in real time, providing multifunctional applications in human/machine interaction, electronic skins, and wearable devices.
Capacitive pressure sensors based on bamboo leaves endow adjustable sensitivity, wide working range and remarkable stability, indicating promising applications in diverse application scenarios.
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