利用植物细胞支架生长表型调控的声子材料
Growing Phenotype-controlled Phononic Materials from Plant Cells Scaffolds
摘要：
生物复合材料提供自愈合特性、生物相容性、对外部刺激的高响应性和多功能性，部分归因于其复杂的、分级的微观结构。这种材料可以廉价地生长，并自下而上进行自组装，从而实现微型和纳米器件的民主化，可持续制造路线。虽然生物复合材料已被证明包含丰富的光子结构，但它们的声子性质迄今尚未被探索。在这项研究中，我们证明了微米厚的脱细胞洋葱细胞支架形式的生物复合材料表现为有机声子材料，具有带隙的存在，禁止弹性波在选定的频率范围内传播。我们表明，洋葱细胞的声子特性可以表型调谐，并预计这些研究结果将产生新的生物衍生的，“绿色”的，和遗传可剪裁的声子材料。
英文摘要：
Biological composites offer self-healing properties, biocompatibility, high responsivity to external stimuli, and multifunctionality, due, in part, to their complex, hierarchical microstructure. Such materials can be inexpensively grown, and self-assembled from the bottom up, enabling democratized, sustainable manufacturing routes for micro- and nano-devices. While biological composites have been shown to incorporate rich photonic structures, their phononic properties have hitherto remained unexplored. In this study, we demonstrate that biological composites in the form of micron-thick decellularized onion cell scaffolds behave as an organic phononic material, with the presence of band gaps forbidding the propagation of elastic waves in select frequency ranges. We show that the onion cells' phononic properties can be phenotypically tuned, and anticipate these findings will yield new biologically-derived, "green", and genetically tailorable phononic materials.
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