Stretchable and biocompatible flexible electronic devices are essential to meet the increasing demands of complex and multifunctional personal healthcare systems. To detect various external stimuli, noninvasively epidermal sensors with reliable and sustainable performances are desirable. Herein, ultrastretchable, self‐healable, and wearable epidermal sensors based on ultralong Ag nanowires (AgNWs) composited binary‐networked hydrogels are fabricated. The flexible hydrogel sensors can monitor dynamic strains in a wide range (4–3000%), realize high healing efficiency (94.3%) and strong adhesiveness, which is attributed to the strong covalent bond and reversible physical interaction structured binary‐network. The ultralong AgNWs network remains in direct contact under strain, ensures a rapid response to external stimuli. The strong interactions between polymer matrix and the nanowires endow the hydrogel sensors excellent sensitivity (gauge factor of 4.59) within a wide sensing range (0–850%). The cycling stability of the hydrogel sensors is further improved by the composition of AgNWs, presenting negligible degradation both on tension and compression. Based on the advantageous performances, the flexible stain sensors can differentiate complicated human motions and realize phonation recognition precisely, showing promising application in next‐generation wearable epidermal sensors with ultrabroad working range and high sensitivity.

中文翻译：

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基于超长银纳米线复合二元网络水凝胶的超拉伸，自愈和可穿戴表皮传感器

可伸缩且生物相容的柔性电子设备对于满足复杂和多功能的个人医疗保健系统不断增长的需求至关重要。为了检测各种外部刺激，需要具有可靠和可持续性能的非侵入性表皮传感器。在此，制造了基于超长银纳米线（AgNWs）复合二元网络水凝胶的超拉伸，自修复和可穿戴表皮传感器。灵活的水凝胶传感器可监测大范围（4-3000％）的动态应变，实现高愈合效率（94.3％）和强粘附性，这归因于强大的共价键和可逆的物理相互作用结构化的二元网络。超长的AgNWs网络在应力作用下保持直接接触，确保对外部刺激的快速反应。聚合物基体和纳米线之间的强相互作用赋予水凝胶传感器出色的灵敏度（4.59的规格系数），可在较宽的感测范围内（0–850％）。AgNWs的组成进一步改善了水凝胶传感器的循环稳定性，在拉伸和压缩时降解都可以忽略不计。凭借其优越的性能，柔性污点传感器可以区分复杂的人类动作并精确实现发声识别，在具有超宽工作范围和高灵敏度的下一代可穿戴表皮传感器中显示出广阔的应用前景。拉伸和压缩时的降解几乎可以忽略不计。凭借其优越的性能，柔性污点传感器可以区分复杂的人类动作并精确实现发声识别，在具有超宽工作范围和高灵敏度的下一代可穿戴表皮传感器中显示出广阔的应用前景。拉伸和压缩时的降解几乎可以忽略不计。凭借其优越的性能，柔性污点传感器可以区分复杂的人类动作并精确实现发声识别，在具有超宽工作范围和高灵敏度的下一代可穿戴表皮传感器中显示出广阔的应用前景。