Advances in the Study of Three-Dimensional Nanomaterials in Flexible Piezoresistive Sensors (FPS)

Due to the exponential growth of flexible pressure sensors that are used in electronic skin, wearable electronics, artificial intelligence, and other related fields, it has become important to study and create high-performance pressure sensors with high sensitivity, a low detection threshold, and a wide range of sensing capabilities. Flexible piezoresistive sensors are notable in the realm of pressure sensors for their straightforward fabrication technique and exceptional ability to conform to various environmental conditions. Conversely, there has been a change in attention towards the enhanced performance of nanomaterials due to their surface phenomenon, quantum size influence, and other related factors. Three-dimensional nanoparticles are a viable option for conducting sensitive materials for flexible piezoresistive sensors because of their distinctive composite structure, which makes up for some flaws in single nanomaterials. This review summarizes three common types of 3D nanomaterial piezoresistive sensors (graphene-based, Menxe-based, PDMS-based), introduces the innovation and development of 3D nanomaterial material properties and micro-nano structures, sensor preparation process and sensor performance, and then introduces the application of 3D nano sensors in health monitoring and motion state detection, and finally looks forward to their future development direction.