The development of flexible capacitive pressure sensors has wide application prospects in the fields of electronic skin and intelligent wearable electronic devices, but it is still a great challenge to fabricate capacitive sensors with high sensitivity. Few reports have considered the use of interdigital electrode structures to improve the sensitivity of capacitive pressure sensors. In this work, a new strategy for the fabrication of a high-performance capacitive flexible pressure sensor based on MXene/polyvinylpyrrolidone (PVP) by an interdigital electrode is reported. By increasing the number of interdigital electrodes and selecting the appropriate dielectric layer, the sensitivity of the capacitive sensor can be improved. The capacitive sensor based on MXene/PVP here has a high sensitivity (~1.25 kPa−1), low detection limit (~0.6 Pa), wide sensing range (up to 294 kPa), fast response and recovery times (~30/15 ms) and mechanical stability of 10000 cycles. The presented sensor here can be used for various pressure detection applications, such as finger pressing, wrist pulse measuring, breathing, swallowing and speech recognition. This work provides a new method of using interdigital electrodes to fabricate a highly sensitive capacitive sensor with very promising application prospects in flexible sensors and wearable electronics.
Although graphene is by far the most famous example of two-dimensional (2D) materials, which exhibits a wealth of exotic and intriguing properties, graphene suffers from a severe drawback. In this...
The magnetoresistance (MR) and magnetic properties of (2 0 0) preferentially oriented Ti1−x
Cr
x
N films have been investigated systematically. All the films are ferromagnetic. The Curie temperature of the films is above 305 K, which is much higher than the previously reported value of 140 K in the Ti1−x
Cr
x
N systems. MR shows a weak saturation trend with the applied magnetic field, and increases significantly with a decrease in temperature below 50 K following the relation log |MR| = a − bT
1/2. The MR–T curves are fitted using MR = P
2/(1 + P
2) with the spin polarization P of
, where the fitted P
0 is 55% at x = 0.14. The enhanced coercivity and low-temperature MR are related to the pinned surface moments of the Cr-doped TiN grains.
Europium, one of the rare earth elements, exhibits +2 and +3 valence states and has been widely used for magnetic modification of materials. Based on density functional theory calculations, we...
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