Highly Flexible and Sensitive Temperature Sensors based on Ti3C2Tx (MXene) for Electronic Skin
Electronic skin (e-skin) has been attracting great research interest and effort due to its potential applications in wearable health monitoring, smart prosthetics, humanoid robots and so on. Temperature is an important parameter for e-skin to perceive surroundings and people. However, less research is executed in the field of flexible temperature sensing and current temperature sensors still face many challenges in practical applications, such as high sensing performance, facile preparation, and differentiating from other stimuli. Herein, we develop a facile fabricating strategy for a Ti3C2Tx based temperature sensor. As the sensing units, Ti3C2Tx nanoparticles and lamellas can be obtained simultaneously through controlling the fabrication conditions. The temperature sensors exhibit tunable sensing performances and a desirable incorporation of a high sensitivity (up to 986 oC-1) and a wide working range (140 oC). Due to high sensitivities, the sensors can also be used as e-skin for proximity detection and illumination detection from ultraviolet to infrared light. For application demonstrations, a 4 × 4 array of the sensors was fabricated for the temperature mapping, indicating great potentials in the applications for monitoring object approaching and temperature variations.