Ti3C2Tx MXene-graphene composite films for wearable strain sensors featured with high sensitivity and large range of linear response

Enhancing the conductivity, stability and flexibility of Ti3C2Tx MXenes by regulating etching conditions

“…[5] have been successively prepared. As two-dimensional materials, MXenes have many characteristics similar to graphene, including metal-like conductivity, large specific surface area, good hydrophilicity and mechanical performance [6][7][8][9], making MXenes very promising in the applications in energy storage [10][11][12], electromagnetic shielding [13][14][15], catalysis [16][17], sensors and so on [18][19][20]. During the aqueous etching progress to remove the A atomic layer, the M-A metal bonds are broken, and the exposed M atoms all need to find suitable ligands, and usually combine with the abundant ions present in the reaction environment to form surface terminations, such as eOH, eO and eF [1][2]5].…”

Understanding the Design Principles of Advanced Aqueous Zinc‐Ion Battery Cathodes: From Transport Kinetics to Structural Engineering, and Future Perspectives

“…For example, Sun et al [154] proposed a 3D holey-graphene/Nb 2 O 5 composite cathode for LIBs, and they demonstrated that such electrode with porosity optimization can still retains a high-rate electrochemical performance (10C) under the mass loading ranging from 1 to 11 mg cm −2 . On the other hand, different from the porosity effect, Yang et al [155] designed a vertically aligned Ti 3 C 2 T x MXene films with the thickness-independent capacitance, by applying a uniaxial in-plane mechanical shear force with the assistant of block copolymer surfactant. The ion transport in the vertical direction ensures the minimum tortuosity inside the electrode, thus benefiting the electrode achieves the similar areal capacitance at scan rates of 1000-2000 mV s −1 with mass loading in the range of 2.80 to 6.16 mg cm −2 .…”

MXene-based Sensors for Detecting Human Physiological Information

“…(4) Moreover, mechanical sensors (pressure sensors and strain sensors) are the most widely used physical sensors and can be applied to detect both vigorous human motions such as joint motion and subtle motion induced by blood pressure, pulse, breathing, and sound. (4) To meet the demand for monitoring and detecting the range of motions of the human body using physical sensors, sensitivity and stretchability are two critical parameters; (28,30) high sensitivity enables a sensor to detect subtle motion, while high stretchability is basic to detect substantial body motions by joint movements in the human body. (31) Also, because a physical sensor should be directly connected with the skin, it is necessary to ensure that materials applied in sensors have high biocompatibility and safety for humans.…”

“…(14,19,26,27) In the past few decades, owing to the rapid development of society and the economy, people's demand for health monitoring and detection has dramatically increased. (28) Owing to the excellent properties and unique morphology of MXenes introduced above, MXenebased sensors with good conductivity, a large surface area, and excellent hydrophilicity have been realized, which exhibit high sensitivity and selectivity, low detection limits, and superior electrochemical activity, satisfying the requirements of body sensing and diagnosis. (12,14,(16)(17)(18) Mohammadniaei et al demonstrated several advantages of MXenes in biosensor applications.…”