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Electronic skin (e-skin) has been attracting great research interest and effort due to its potential applications in wearable health monitoring devices, smart prosthetics, humanoid robots and so on. Temperature is an important parameter for e-skin to perceive surroundings and people. However, little research has been carried out 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 fabrication strategy for Ti3C2Tx based temperature sensors. As the sensing units, Ti3C2Tx nanoparticles and lamellae can be obtained simultaneously through controlling the fabrication conditions. These temperature sensors exhibit tunable sensing performances and a desirable combination of a high sensitivity (up to 986 °C−1) and a wide working range (140 °C). Due to their high sensitivity, these sensors can also be used as e-skin for proximity detection and illumination detection from ultraviolet to infrared light. For application demonstration, a 4 × 4 array of the sensors was fabricated for temperature mapping, indicating their great potential for monitoring approaching objects and temperature variations. [ABSTRACT FROM AUTHOR]

A high sensitivity and large stretchability are desirable for strain sensors in wearable applications. However, these two performance indicators are contradictory, since the former requires a conspicuous structural change under a tiny strain, whereas the latter demands morphological integrity upon a large deformation. Developing strain sensors with both a high sensitivity (gauge factor (GF) > 100) and a broad strain range (>50%) is a considerable challenge. Herein, a unique Ti3C2Tx MXene nanoparticle–nanosheet hybrid network is constructed. The migration of nanoparticles leads to a large resistance variation while the wrapping of nanosheet bridges the detached nanoparticles to maintain the connectivity of the conductive pathways in a large strain region. The synergetic motion of nanoparticles and nanosheets endows the hybrid network with splendid electrical–mechanical performance, which is reflected in its high sensitivity (GF > 178.4) over the entire broad range (53%), the super low detection limit (0.025%), and a good cycling durability (over 5000 cycles). Such high performance endows the strain sensor with the capability for full‐range human motion detection. A strain sensor based on a Ti3C2Tx nanoparticle‐nanosheet hybrid network exhibits high sensitivity over the entire broad range due to the synergetic motion of nanoparticles and nanosheets and a constrained microcrack propagation mechanism. The migration of nanoparticles leads to a large resistance variation while the wrapping of the nanosheets bridges the nanoparticles and maintains the connectivity of the conductive pathways. [ABSTRACT FROM AUTHOR]