The hybrid structure of liquid metal units and organic elastomer has huge potential in achieving stretchable and reversible stiffness regulation, while such tuning is often restrained by high energy consumption for liquid metal solidification. Here, we conceive to solve the above challenge through introducing the fully leveraging interaction between supercooled liquid metal and homocrystal seeds within silicone elastomer. It is disclosed that the supercooled liquid metal-elastomer can maintain an extremely stable soft state until the supercooling is eliminated by modulating the mechanical force and elastomer deformation. This circumvents the utilization of intricate refrigeration equipment and offers a highly efficient and concise strategy for stiffness regulation. Moreover, conceptual experiments were performed to demonstrate the practical values of this technology through designing and testing the new shape memory materials, temperature-sensitive switches, and controlled circuits. The solidification mechanisms of supercooled Ga triggered by homocrystal seeds were interpreted. Overall, the present finding has generalized purposes and holds promise to significantly extend the theoretical and technological categories of classical stiffness tunable materials.

中文翻译：

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由同晶种子引发的液态金属弹性体的可拉伸刚度调节

液态金属单元和有机弹性体的混合结构在实现可拉伸和可逆刚度调节方面具有巨大潜力，但这种调节往往受到液态金属凝固高能耗的限制。在这里，我们设想通过在有机硅弹性体中引入过冷液态金属和同晶晶种之间的充分利用相互作用来解决上述挑战。据公开，过冷液态金属弹性体可以保持极其稳定的软态，直到通过调节机械力和弹性体变形消除过冷。这避免了复杂制冷设备的使用，并提供了一种高效、简洁的刚度调节策略。此外，还进行了概念实验，通过设计和测试新型形状记忆材料、温敏开关和控制电路来证明该技术的实用价值。解释了同晶晶种引发的过冷Ga的凝固机制。总的来说，目前的发现具有普遍的目的，并有望显着扩展经典刚度可调材料的理论和技术类别。