Chapter 8 - MXenes and their composites as piezoresistive sensors

Abstract

The discovery of and advancements in MXenes and their composites have opened new windows to the potential exploitation of this material for a new generation of portable or wearable piezoresistive sensors. A conductive layered materials of accordion-like morphology with controllable interlayer distances and highly tunable surface terminations, MXenes have been recognized as a promising piezoresistive material. While attaining augmented sensitivity with MXene-based piezoresistive transducers, efforts were also devoted to achieving better mechanical stability, flexibility, and optical and electromagnetic properties by integrating with diverse functional materials. Thus the unique morphology of this material could be constructively exploited to engineer promising hybrid piezoresistive sensor platforms in forms such as flexible displays, wearable devices, and electronic skins for monitoring various pressure and strain changes created by physical stimuli, weak pressure, or physiological signals. This chapter discusses advancements to date in MXene-based composites as piezoresistive platforms for various sensors. Key challenges and future prospects are also addressed.