Ti₃C₂T_<i>x</i> MXene Nanosheet-Functionalized Leathers for Versatile Wearable Electronics

Flexible and multifunctional wearable electronics have attracted widespread attention. Herein, a flexible and multifunctional wearable MXene/leather fabricated by a simple vacuum filtration process has been reported. The fabricated MXene/leathers retain the unique thinness (∼1 mm) and breathability of the leather, which contributes to its comfort as wearable electronic devices. In addition, benefiting from the high-efficiency three-dimensional conductive network formed by the tight wrapping of collagen fiber bundles by MXene nanosheets inside the leather, MXene/leather exhibited excellent mechanical properties (Young’s modulus of 9.64 MPa) and conductivity (24.6 Ω sq–1). MXene/leather also has outstanding efficiency in electric-thermal conversion, which can be used as a flexible resistive heater to intelligently regulate the temperature of different parts of the human body at low driven voltages. Moreover, the flexible pressure sensor based on MXene/leather possesses a high sensitivity of 33.58 kPa–1, which can match the human finger pressure over a wide range without apparent deterioration. The MXene/leather-based pressure sensor can be assembled with a mechanical claw to simulate human skin for tactile recognition of object size and softness in a nondestructive manner. Finally, the MXene/leather-based triboelectric nanogenerator can not only be integrated with alternative current electroluminescence to construct a flexible display system but also monitor the human body’s movements to evaluate the health condition by harvesting mechanical energy from body movement. The MXene/leathers proposed have the potential to serve as a new versatile platform for the development of next-generation multifunctional wearable electronics

Ti₃C₂T_<i>x</i> MXene Nanosheet-Functionalized Leathers for Versatile Wearable Electronics

Flexible and multifunctional wearable electronics have attracted widespread attention. Herein, a flexible and multifunctional wearable MXene/leather fabricated by a simple vacuum filtration process has been reported. The fabricated MXene/leathers retain the unique thinness (∼1 mm) and breathability of the leather, which contributes to its comfort as wearable electronic devices. In addition, benefiting from the high-efficiency three-dimensional conductive network formed by the tight wrapping of collagen fiber bundles by MXene nanosheets inside the leather, MXene/leather exhibited excellent mechanical properties (Young’s modulus of 9.64 MPa) and conductivity (24.6 Ω sq–1). MXene/leather also has outstanding efficiency in electric-thermal conversion, which can be used as a flexible resistive heater to intelligently regulate the temperature of different parts of the human body at low driven voltages. Moreover, the flexible pressure sensor based on MXene/leather possesses a high sensitivity of 33.58 kPa–1, which can match the human finger pressure over a wide range without apparent deterioration. The MXene/leather-based pressure sensor can be assembled with a mechanical claw to simulate human skin for tactile recognition of object size and softness in a nondestructive manner. Finally, the MXene/leather-based triboelectric nanogenerator can not only be integrated with alternative current electroluminescence to construct a flexible display system but also monitor the human body’s movements to evaluate the health condition by harvesting mechanical energy from body movement. The MXene/leathers proposed have the potential to serve as a new versatile platform for the development of next-generation multifunctional wearable electronics

Ti₃C₂T_<i>x</i> MXene Nanosheet-Functionalized Leathers for Versatile Wearable Electronics

Flexible and multifunctional wearable electronics have attracted widespread attention. Herein, a flexible and multifunctional wearable MXene/leather fabricated by a simple vacuum filtration process has been reported. The fabricated MXene/leathers retain the unique thinness (∼1 mm) and breathability of the leather, which contributes to its comfort as wearable electronic devices. In addition, benefiting from the high-efficiency three-dimensional conductive network formed by the tight wrapping of collagen fiber bundles by MXene nanosheets inside the leather, MXene/leather exhibited excellent mechanical properties (Young’s modulus of 9.64 MPa) and conductivity (24.6 Ω sq–1). MXene/leather also has outstanding efficiency in electric-thermal conversion, which can be used as a flexible resistive heater to intelligently regulate the temperature of different parts of the human body at low driven voltages. Moreover, the flexible pressure sensor based on MXene/leather possesses a high sensitivity of 33.58 kPa–1, which can match the human finger pressure over a wide range without apparent deterioration. The MXene/leather-based pressure sensor can be assembled with a mechanical claw to simulate human skin for tactile recognition of object size and softness in a nondestructive manner. Finally, the MXene/leather-based triboelectric nanogenerator can not only be integrated with alternative current electroluminescence to construct a flexible display system but also monitor the human body’s movements to evaluate the health condition by harvesting mechanical energy from body movement. The MXene/leathers proposed have the potential to serve as a new versatile platform for the development of next-generation multifunctional wearable electronics

Ti₃C₂T_<i>x</i> MXene Nanosheet-Functionalized Leathers for Versatile Wearable Electronics

Flexible and multifunctional wearable electronics have attracted widespread attention. Herein, a flexible and multifunctional wearable MXene/leather fabricated by a simple vacuum filtration process has been reported. The fabricated MXene/leathers retain the unique thinness (∼1 mm) and breathability of the leather, which contributes to its comfort as wearable electronic devices. In addition, benefiting from the high-efficiency three-dimensional conductive network formed by the tight wrapping of collagen fiber bundles by MXene nanosheets inside the leather, MXene/leather exhibited excellent mechanical properties (Young’s modulus of 9.64 MPa) and conductivity (24.6 Ω sq–1). MXene/leather also has outstanding efficiency in electric-thermal conversion, which can be used as a flexible resistive heater to intelligently regulate the temperature of different parts of the human body at low driven voltages. Moreover, the flexible pressure sensor based on MXene/leather possesses a high sensitivity of 33.58 kPa–1, which can match the human finger pressure over a wide range without apparent deterioration. The MXene/leather-based pressure sensor can be assembled with a mechanical claw to simulate human skin for tactile recognition of object size and softness in a nondestructive manner. Finally, the MXene/leather-based triboelectric nanogenerator can not only be integrated with alternative current electroluminescence to construct a flexible display system but also monitor the human body’s movements to evaluate the health condition by harvesting mechanical energy from body movement. The MXene/leathers proposed have the potential to serve as a new versatile platform for the development of next-generation multifunctional wearable electronics

Ti₃C₂T_<i>x</i> MXene Nanosheet-Functionalized Leathers for Versatile Wearable Electronics

Flexible and multifunctional wearable electronics have attracted widespread attention. Herein, a flexible and multifunctional wearable MXene/leather fabricated by a simple vacuum filtration process has been reported. The fabricated MXene/leathers retain the unique thinness (∼1 mm) and breathability of the leather, which contributes to its comfort as wearable electronic devices. In addition, benefiting from the high-efficiency three-dimensional conductive network formed by the tight wrapping of collagen fiber bundles by MXene nanosheets inside the leather, MXene/leather exhibited excellent mechanical properties (Young’s modulus of 9.64 MPa) and conductivity (24.6 Ω sq–1). MXene/leather also has outstanding efficiency in electric-thermal conversion, which can be used as a flexible resistive heater to intelligently regulate the temperature of different parts of the human body at low driven voltages. Moreover, the flexible pressure sensor based on MXene/leather possesses a high sensitivity of 33.58 kPa–1, which can match the human finger pressure over a wide range without apparent deterioration. The MXene/leather-based pressure sensor can be assembled with a mechanical claw to simulate human skin for tactile recognition of object size and softness in a nondestructive manner. Finally, the MXene/leather-based triboelectric nanogenerator can not only be integrated with alternative current electroluminescence to construct a flexible display system but also monitor the human body’s movements to evaluate the health condition by harvesting mechanical energy from body movement. The MXene/leathers proposed have the potential to serve as a new versatile platform for the development of next-generation multifunctional wearable electronics

Ti₃C₂T_<i>x</i> MXene Nanosheet-Functionalized Leathers for Versatile Wearable Electronics

Flexible and multifunctional wearable electronics have attracted widespread attention. Herein, a flexible and multifunctional wearable MXene/leather fabricated by a simple vacuum filtration process has been reported. The fabricated MXene/leathers retain the unique thinness (∼1 mm) and breathability of the leather, which contributes to its comfort as wearable electronic devices. In addition, benefiting from the high-efficiency three-dimensional conductive network formed by the tight wrapping of collagen fiber bundles by MXene nanosheets inside the leather, MXene/leather exhibited excellent mechanical properties (Young’s modulus of 9.64 MPa) and conductivity (24.6 Ω sq–1). MXene/leather also has outstanding efficiency in electric-thermal conversion, which can be used as a flexible resistive heater to intelligently regulate the temperature of different parts of the human body at low driven voltages. Moreover, the flexible pressure sensor based on MXene/leather possesses a high sensitivity of 33.58 kPa–1, which can match the human finger pressure over a wide range without apparent deterioration. The MXene/leather-based pressure sensor can be assembled with a mechanical claw to simulate human skin for tactile recognition of object size and softness in a nondestructive manner. Finally, the MXene/leather-based triboelectric nanogenerator can not only be integrated with alternative current electroluminescence to construct a flexible display system but also monitor the human body’s movements to evaluate the health condition by harvesting mechanical energy from body movement. The MXene/leathers proposed have the potential to serve as a new versatile platform for the development of next-generation multifunctional wearable electronics

Ti₃C₂T_<i>x</i> MXene Nanosheet-Functionalized Leathers for Versatile Wearable Electronics

Flexible and multifunctional wearable electronics have attracted widespread attention. Herein, a flexible and multifunctional wearable MXene/leather fabricated by a simple vacuum filtration process has been reported. The fabricated MXene/leathers retain the unique thinness (∼1 mm) and breathability of the leather, which contributes to its comfort as wearable electronic devices. In addition, benefiting from the high-efficiency three-dimensional conductive network formed by the tight wrapping of collagen fiber bundles by MXene nanosheets inside the leather, MXene/leather exhibited excellent mechanical properties (Young’s modulus of 9.64 MPa) and conductivity (24.6 Ω sq–1). MXene/leather also has outstanding efficiency in electric-thermal conversion, which can be used as a flexible resistive heater to intelligently regulate the temperature of different parts of the human body at low driven voltages. Moreover, the flexible pressure sensor based on MXene/leather possesses a high sensitivity of 33.58 kPa–1, which can match the human finger pressure over a wide range without apparent deterioration. The MXene/leather-based pressure sensor can be assembled with a mechanical claw to simulate human skin for tactile recognition of object size and softness in a nondestructive manner. Finally, the MXene/leather-based triboelectric nanogenerator can not only be integrated with alternative current electroluminescence to construct a flexible display system but also monitor the human body’s movements to evaluate the health condition by harvesting mechanical energy from body movement. The MXene/leathers proposed have the potential to serve as a new versatile platform for the development of next-generation multifunctional wearable electronics

Piezoresistive Sensor Containing Lamellar MXene-Plant Fiber Sponge Obtained with Aqueous MXene Ink

Sustainable biomass materials are promising for low-cost wearable piezoresistive pressure sensors, but these devices are still produced with time-consuming manufacturing processes and normally display low sensitivity and poor mechanical stability at low-pressure regimes. Here, an aqueous MXene ink obtained by simply ball-milling is developed as a conductive modifier to fabricate the multiresponsive bidirectional bending actuator and compressible MXene-plant fiber sponge (MX-PFS) for durable and wearable pressure sensors. The MX-PFS is fabricated by physically foaming MXene ink and plant fibers. It possesses a lamellar porous structure composed of one-dimensional (1D) MXene-coated plant fibers and two-dimensional (2D) MXene nanosheets, which significantly improves the compression capacity and elasticity. Consequently, the encapsulated piezoresistive sensor (PRS) exhibits large compressible strain (60%), excellent mechanical durability (10 000 cycles), low detection limit (20 Pa), high sensitivity (435.06 kPa–1), and rapid response time (40 ms) for practical wearable applications

Large-Deformation Curling Actuators Based on Carbon Nanotube Composite: Advanced-Structure Design and Biomimetic Application

In recent years, electroactive polymers have been developed as actuator materials. As an important branch of electroactive polymers, electrothermal actuators (ETAs) demonstrate potential applications in the fields of artificial muscles, biomimetic devices, robotics, and so on. Large-shape deformation, low-voltage-driven actuation, and ultrafast fabrication are critical to the development of ETA. However, a simultaneous optimization of all of these advantages has not been realized yet. Practical biomimetic applications are also rare. In this work, we introduce an ultrafast approach to fabricate a curling actuator based on a newly designed carbon nanotube and polymer composite, which completely realizes all of the above required advantages. The actuator shows an ultralarge curling actuation with a curvature greater than 1.0 cm^–1 and bending angle larger than 360°, even curling into a tubular structure. The driving voltage is down to a low voltage of 5 V. The remarkable actuation is attributed not only to the mismatch in the coefficients of thermal expansion but also to the mechanical property changes of materials during temperature change. We also construct an S-shape actuator to show the possibility of building advanced-structure actuators. A weightlifting walking robot is further designed that exhibits a fast-moving motion while lifting a sample heavier than itself, demonstrating promising biomimetic applications