Metamaterials possessing multiple unusual properties have aroused wide attention and exploration, because they are more adaptive to application requirements than materials with a single system. Particularly, recent work has proposed mechanical metamaterials with both negative Poisson's ratio and negative thermal expansion. These mechanical metamaterials with dual negative properties show great prospect for devices that are both mechanical- and temperature-sensitive. Unfortunately, the accessible ranges of Poisson's ratio and thermal expansion reported so far are still very narrow. Here, a multifunctional metamaterial with controllable Poisson's ratio and thermal expansion coefficient with a wide range is designed and fabricated. It can reach both negative and positive thermal expansion (−2347 to 1786 ppm/K⁻¹), and possesses high negative Poisson's ratio (up to -17.234). This research further expands the accessible range of Poisson's ratio and thermal expansion coefficient, promoting the application of multifunctional metamaterial.

具有多种不寻常特性的超材料引起了广泛的关注和探索，因为它们比具有单一体系的材料更能适应应用需求。特别是，最近的工作提出了具有负泊松比和负热膨胀的机械超材料。这些具有双重负特性的机械超材料显示出对机械和温度敏感的设备的巨大前景。不幸的是，迄今为止报告的泊松比和热膨胀的可及范围仍然很窄。在这里，设计并制造了一种具有可控泊松比和热膨胀系数的多功能超材料。它可以达到负热膨胀和正热膨胀（−2347 至 1786 ppm/K ⁻¹), 并具有高负泊松比 (高达 -17.234)。该研究进一步扩大了泊松比和热膨胀系数的可及范围，促进了多功能超材料的应用。