MXene-Based Bilayer Structures with Multiresponsive Actuating and Sensing Multifunctions

Abstract

Smart wearable devices have demonstrated promising applications in virtual reality, health monitoring, motion tracking, and beyond. Recently, MXene with fascinating physical/chemical properties has been considered an ideal candidate to make the core components of smart wearable devices such as soft actuators and sensors. However, most current MXene-based devices present only actuating or sensing features, which may prohibit the integrated development of smart wearable devices. Here, a multifunctional MXene/tape bilayer film that integrates multiresponsive actuating and sensing functions is reported. Owing to the distinct hygroexpansion effect and thermal expansivity of two layers, the MXene/tape bilayer film can be manipulated under moisture, light, and electricity. Meanwhile, this MXene/tape bilayer film can be used as a strain sensor by introducing microcracks into the MXene layer. As a proof of concept, smart devices, including a wearable interactive manipulator system and a wearable interactive gripper system, are fabricated, revealing great potential for developing flexible robotics and smart wearable devices.