Robust and Multifunctional Kirigami Electronics with a Tough and Permeable Aramid Nanofiber Framework

Abstract

components combine excellent electronic performance and good stretchability, [8,9] but their delicate structures are prone to mechanical damage. Transfer printing of serpentine electronics onto elastomer films could enhance their overall structural robustness. [10,11] However, the dense polymer substrate may hinder water and vapor transport arising from biological tissues, causing potential issues for wearable applications. [12][13][14][15] In addition, poor conformability of dense films on non-developable 3D surfaces is another limitation. [16,17] Kirigami-inspired structures have recently emerged as promising candidates for stretchable electronics. [18][19][20][21][22][23]

High-Strength Magnetic Hydrogels with Photoweldability Made by Stepwise Assembly of Magnetic-Nanoparticle-Integrated Aramid Nanofiber Composites

“…Our recent work has demonstrated the ability to integrate various microelectronic sensors and electroactive polymers onto ANF-PVA-based materials. 21 In combination with the soft electronics, the multifunctional hydrogel platform may achieve more sophisticated sensing and actuation capabilities in a closed-loop manner. The hybrid device platform could enable diverse applications in implantable surgical tools, human−robot interactions, controlled release of drugs, photothermal therapies, and many other technologies.…”

“…Using NIR welding methods, we can achieve custom-designed heterogeneous structures with the possibility of complex modes of deformation. Our recent work has demonstrated the ability to integrate various microelectronic sensors and electroactive polymers onto ANF-PVA-based materials . In combination with the soft electronics, the multifunctional hydrogel platform may achieve more sophisticated sensing and actuation capabilities in a closed-loop manner.…”

“…Recently emerged nanocomposites based on aramid nanofibers (ANFs) indicate a route for the engineering of magnetic hydrogels that could address these challenges. ,− ANFs self-assemble into 3D networks that exhibit microstructural properties similar to those of natural collagen fibers, providing a biomimetic framework for the construction of various soft composites . The polar groups on ANFs allow interactions with other organic materials, facilitating the formation of functional hydrogels that retain the high structural robustness arising from the nanofiber skeleton. , Nevertheless, incorporation of magnetic components in the ANF network is still difficult.…”

Highly Stretchable and Strain‐Insensitive Liquid Metal based Elastic Kirigami Electrodes (LM‐eKE)

“…et al introduced a multifunctional kirigami device that can measure electrocardiogram (ECG) and electromyogram (EMG) by creating kirigami structure using a composite nanofiber framework. [20] The kirigami was also applied to fabricate conformal self-healable electronics, playing an important role in demonstrating hemispherical heaters and wind-sensing systems. [7] However, these previous efforts with kirigami electronics employed paper-like substrates or rigid conductive materials, which limit maximum elongation (Table S1, Supporting Information).…”

Decorated bacteria-cellulose meta-skin kirigami

“…For centuries, inspired by the paper-cutting art, the techniques of kirigami and origami were utilized to fashion cellulose thin films (or sheets) into complex structures with unconventional mechanical and morphological responses [5][6][7] , further leading to the implementation of bio-compatible flexible devices 8,9 . However, owing to the strong hydrophilic nature and water-induced swelling behavior 10 , the cellulose film in water environment suffers much from very poor mechanical stability and structural collapses in the kirigami (or origami) processes 11 , restricting its potential applications in the underwater flexible electronics as well as the soft robots [12][13][14][15][16] . Modifying materials with superhydrophobic interface is regarded as a feasible approach to avoid the influence from wetting surface 17 .…”