Wearable Pressure Sensor Array with Layer-by-Layer Assembled MXene Nanosheets/Ag Nanoflowers for Motion Monitoring and Human-Machine Interfaces.

TL;DR: Recent advances in flexible pressure sensors based on MXene materials focus on sensing type, sensing mechanism, material selection, structural design, preparation strategy and sensing application. MXene has revolutionized flexible pressure sensing due to its unique properties. The review explores methods and strategies to improve sensor performance and discusses opportunities and challenges.

TL;DR: In this article , a flexible pressure sensor with a porous structure is proposed by coating molybdenum disulfide (MoS2) and hydroxyethyl cellulose (HEC) on a polyurethane (PU) sponge skeleton.

TL;DR: A PDMS film-based flexible pressure sensor array with surface protruding structure is designed for human motion detection and wrist posture recognition. The sensor has a wide linear detection range, outstanding sensitivity, and stability. It can detect a wide range of human movements and small movements, as well as the pressure distribution and shape of an object.

TL;DR: In this paper , an ultrastretchable high-conductivity MXene-based organohydrogel (M-OH) is developed for human health monitoring and machine-learning-assisted object recognition, which is fabricated based on a Ti3C2Tx MXene/lithium salt (LS)/poly(acrylamide) (PAM)/polyvinyl alcohol)(PVA) hydrogel through a facile immersion strategy in a glycerol/water binary solvent.

TL;DR: Electrode films prepared from a liquid-crystal phase of vertically aligned two-dimensional titanium carbide show electrochemical energy storage that is nearly independent of film thickness, which makes them highly attractive for energy storage applications.

Abstract: Although multifunctional, flexible, and wearable textiles with integrated smart electronics have attracted tremendous attention in recent years, it is still an issue to balance new functionalities with the inherent performances of the textile substrates. 2D early transition metal carbides/nitrides (MXenes) are considered as ideal nanosheets for fabricating multifunctional and flexible textiles on the basis of their superb intrinsic electrical conductivity, tunable surface chemistry, and layered structure. Herein, highly conductive and hydrophobic textiles with exceptional electromagnetic interference (EMI) shielding efficiency and excellent Joule heating performance are fabricated by depositing in situ polymerized polypyrrole (PPy) modified MXene sheets onto poly(ethylene terephthalate) textiles followed by a silicone coating. The resultant multifunctional textile exhibits high electrical conductivity of ≈1000 S m−1 in conjunction with an exceptional EMI shielding efficiency of ≈90 dB at a thickness of 1.3 mm. The thin silicone coating renders the hydrophilic PPy/MXene‐decorated textile hydrophobic, leading to an excellent water‐resistant feature while retaining a satisfactory air permeability of the textile. Interestingly, the multifunctional textile also exhibits an excellent moderate voltage‐driven Joule heating performance. Thus, the deposition of PPy‐modified MXene followed by silicone coating creates a multifunctional textile that holds great promise for wearable intelligent garments, EMI shielding, and personal heating applications.

TL;DR: A highly sensitive, flexible, and degradable pressure sensor fabricated by sandwiching porous MXene-impregnated tissue paper between a biodegradable polylactic acid (PLA) thin sheet and an interdigitated electrode-coated PLA thin sheet that exhibits high sensitivity with a low detection limit, broad range, fast response, and robust environmental degradability.

TL;DR: This Review summarizes recent advances of large-area flexible TCFs enabled by several roll-to-roll-compatible printed techniques including inkjet printing, screen printing, offset printing, and gravure printing using the emerging transparent conductive materials.