Smart reconfigurable metamaterials can better adapt to changing electromagnetic environments and broaden the range of applications. However, constructing electromagnetic reconfigurable metamaterials, especially those with large areas or applied to complex surfaces via a universal approach, is still a challenge. Here, we introduce a smart reconfigurable metamaterial consisting of a thermadapt shape memory polymer ethylene vinyl acetate copolymer (EVA) matrix and a flowable liquid–metal resonant unit. Based on the excellent self-healing properties of EVA, large-area metamaterials can be constructed by thermal assembly of metamaterial units. In addition, the original shape of the metamaterial can be reprogrammed to apply to complex three-dimensional surfaces with the reprocessing properties of EVA. Moreover, by utilizing the shape memory performance of the EVA, the temporary resonant frequency of the metamaterial can be set by programming and the resonant frequency tuning of the metamaterial can be controlled under external temperature stimulation, achieving noncontact tuning. In the future, this concept can be broadly applied in fields such as complex structure stealth layers and multifunction filters.

中文翻译：

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基于热适应形状记忆的智能可重构电磁超材料聚（乙烯-醋酸乙烯酯）


智能可重构超材料可以更好地适应不断变化的电磁环境，拓宽应用范围。然而，构建电磁可重构超材料，特别是那些大面积或通过通用方法应用于复杂表面的超材料，仍然是一个挑战。在这里，我们介绍了一种智能可重构超材料，由热适应形状记忆聚合物乙烯醋酸乙烯酯共聚物（EVA）基质和可流动的液态金属谐振单元组成。基于EVA优异的自愈特性，可以通过超材料单元热组装的方式构建大面积超材料。此外，超材料的原始形状可以通过EVA的再加工特性重新编程，以应用于复杂的三维表面。此外，利用EVA的形状记忆性能，可以通过编程设定超材料的临时谐振频率，并在外部温度刺激下控制超材料的谐振频率调谐，实现非接触调谐。未来，这一概念可以广泛应用于复杂结构隐形层和多功能滤波器等领域。