Compliant materials are crucial for stretchable electronics. Stretchable solids and gels have limitations in deformability and durability, whereas active liquids struggle to create complex devices. This study presents multifunctional yield-stress fluids as printable ink materials to construct stretchable electronic devices. Ionic nanocomposites comprise silica nanoparticles and ion liquids, while electrical nanocomposites use the natural oxidation of liquid metals to produce gallium oxide nanoflake additives. These nanocomposite inks can be printed on an elastomer substrate and stay in a solid state for easy encapsulation. However, their transition into a liquid state during stretching allows ultrahigh deformability up to the fracture strain of the elastomer. The ionic inks produce strain sensors with high stretchability and temperature sensors with high sensitivity of 7% °C^–1. Smart gloves are further created by integrating these sensors with printed electrical interconnects, demonstrating bimodal detection of temperatures and hand gestures. The nanocomposite yield-stress fluids combine the desirable qualities of solids and liquids for stretchable devices and systems.

中文翻译：

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用于可印刷和可拉伸电子产品的多功能纳米复合材料屈服应力流体


合规材料对于可拉伸电子产品至关重要。可拉伸固体和凝胶在变形性和耐用性方面存在局限性，而活性液体则难以制造复杂的设备。这项研究提出了多功能屈服应力流体作为可印刷油墨材料来构建可拉伸电子设备。离子纳米复合材料包含二氧化硅纳米颗粒和离子液体，而电纳米复合材料利用液态金属的自然氧化来生产氧化镓纳米片添加剂。这些纳米复合材料墨水可以印刷在弹性体基材上并保持固态以便于封装。然而，它们在拉伸过程中转变为液态，从而实现了高达弹性体断裂应变的超高变形能力。离子墨水可生产具有高拉伸性的应变传感器和具有 7% °C 高灵敏度的温度传感器 ^–1 。通过将这些传感器与印刷电气互连集成，进一步创建智能手套，展示温度和手势的双模检测。纳米复合材料屈服应力流体结合了可拉伸装置和系统所需的固体和液体的品质。