Piezoresistive tactile fabrics for wearable electronics are fundamentally limited by the conflicting needs for high-pressure sensitivity and stable signal transmission, as conventional yarns can suffer from severe inter-pixel crosstalk and strain-induced signal drift. To address this, we present a strain-tolerant tactile fabric using a core–sheath yarn architecture that spatially decouples sensing and conduction. The core, fabricated from silver nanoparticle-decorated styrene butadiene styrene (SBS) yarns and eutectic gallium–indium (EGaIn), provides high electromechanical stability at large strains for robust signal transmission. Simultaneously, a carbon nanotube/polyurethane sheath ensures high piezoresistive sensitivity for precise pressure detection. Weaving these yarns into an 8 × 8 array effectively suppresses tensile and pressure-induced crosstalk (< 5
In this study, a piezoelectric nanogenerator (PENG) integrated with a moth-eye nanopatterned (MENP) perfluoropolyether (PFPE) film was fabricated using electrospinning, metal electroplating, spin-coating, and photolithography. The combination of these techniques enables the ultrathin MENP-PENG to possess high transparency, high sensitivity, and enhanced energy-harvesting performance, which are difficult to achieve simultaneously in conventional PENGs. Under an 11 mg water droplet impact, the MENP-PENG generated an output voltage of 1.0 V through a morphology-assisted hybrid response involving deformation-mediated piezoelectric transduction of the piezoelectric layer and liquid–solid contact electrification/electrostatic induction at the MENP/water interface, corresponding to a static-equivalent gravitational load of 100 μN. Owing to its self-cleaning and anti-reflective properties, the MENP-PENG shows potential as a transparent protective platform for electric vehicle camera modules. These results demonstrate that the materials design and fabrication strategy proposed here provide an effective route toward transparent, flexible, and high-performance PENGs for emerging electric vehicle camera applications.
Natural ligaments achieve joint stability and mobility through hierarchical fibrous architectures encoding non-linear and deformation dependent mechanics, which remain elusive in artificial substitutes. Here, we report a bioinspired braiding strategy for artificial ligaments with programmable mechanical responses. By encoding knot structure, braiding length, and strand count, we achieve ligaments exhibiting tunable non-linear J-shaped force–displacement behavior with independently tunable deformation of the toe region and stiffness of the linear region. This programmability arises from hierarchical deformation, knot reconfiguration governing compliance onset, while structure-mediated strain transmission coordinates global deformation. Integrating mechanical characterization with machine learning enables mapping natural ligament mechanics onto an architected design space for data-driven configuration discovery. The resulting artificial ligaments reproduce non-linear mechanical responses with up to 99
Aramid-based materials integrating electromagnetic wave (EMW) absorption and thermal dissipation are in urgent demand to mitigate electromagnetic interference and heat accumulation in high-frequency and high-power-density electronics. However, achieving broadband synergistic enhancement at low filler loading remains a great challenge due to the trade-off between electromagnetic control and phonon transport in hierarchical fibrous networks. Herein, we propose a graphene fibers (GFs)-mediated modulation strategy to construct an aspect-ratio-tailored hierarchical percolation network within an aramid fiber paper (AFP) matrix via a scalable wet-papermaking process. By decoupling GF content and fiber length, the topological configuration and electromagnetic parameters of the hierarchical network are precisely tailored to bridge the gap between dielectric loss and thermal conduction. At a low loading of 4 wt.
High mechanical tension during wound closure typically triggers a pathological scarring cascade. Conventional surgical sutures act merely as passive tissue approximators, lacking the capacity to actively modulate this detrimental microenvironment. Herein, we establish a “closure as treatment” paradigm through the development of an electromechanically synergistic smart suture (S@VP@PPy) designed for scarless repair of high-tension wounds. The system features a hierarchical bilayer architecture comprising a verteporfin (VP)-loaded chitosan/gelatin drug reservoir and a conductive polypyrrole (PPy) outer coating. Transcriptomic and spatiotemporal protein analyses reveal a molecular division of labor. VP pharmacologically intercepts the transduction of mechanical stress into profibrotic cascades via YAP inhibition, concurrently resolving hyperinflammation and softening the extracellular matrix (ECM) by redirecting fibroblast fate. Within this softened permissive niche, PPy-mediated bioelectric stimulation accelerates re-epithelialization and activates the Wnt/β-catenin pathway to drive hair placode invagination. In a rat dorsal high-tension model, this spatiotemporal cooperation successfully intercepts the “tension-inflammation-fibrosis” cascade, culminating in scarless healing with de novo appendage regeneration.
