A High-Performance Wearable Ag/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene-Based Fiber Sensor for Temperature Sensing, Pressure Sensing, and Human Motion Detection
Hailian Liu, Ning Yang, Qi Zhang, Fang Wang, Xin Yan, Xuenan Zhang, Tonglei Cheng
Abstract
In this work, a high-performance wearable sensor of excellent flexibility was fabricated by dip-coating Ti <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> T <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> MXene material (M) on a polyester fiber (PET) substrate and depositing silver nanoparticles (Ag) by magnetron sputtering. The Ag/M/PET fiber sensor not only responds well to the stimuli of temperature, pressure/strain signals, but also exhibits high temperature sensitivity (0~10 °C: -3.4938 % °C <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> , 10~30 °C: -1.0436 % °C <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> ), relatively fast response and recovery time to pressure (130 ms), low-pressure detection limit (6.5 mg, 1 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ), and good cycling stability (1000 cycles). The proposed fiber sensor has the advantages of high sensitivity, simple structure, convenient fabrication, and excellent multimodal sensing capability, which makes it a valuable candidate for human motion detection and personal healthcare.