Synthesis of 2D Ti3C2Tx MXene and MXene-based composites for flexible strain and pressure sensors

As an important device in flexible and wearable microelectronics, flexible sensors have gained a lot of attention due to their wide application in human motion monitoring, human-computer interactions and healthcare fields. The preparation of flexible sensors with superior sensing performance and a simple process is still a challenging goal pursued by scientific researchers all over the world. The emerging two-dimensional (2D) Ti3C2Tx MXene material, having the characteristics of high metallic conductivity, good flexibility, excellent dispersibility and hydrophilicity, is suitable for flexible sensors as a conductive sensing material. In this review, the preparation strategies of Ti3C2Tx are summarized. Combined with its research progress in flexible sensors, the preparation methods, sensing performance, working mechanism and applications of Ti3C2Tx flexible sensors with different device architectures are reviewed.