Unraveling the relation of the Mechanics and nano-structure of Sea Urchin Spines for Bio-Inspired Materials

Sea urchin spines possess intricate 3D structures, combining strength and flexibility. These remarkable properties arise from a unique composition, including varying magnesium distribution and amorphous material. By subjecting the spines to mild heat treatments, previous research showed changes in flexibility, suggesting the role of compositional variations. Our proposed study employs nanotomography and in-situ annealing to track temperature-induced alterations in spine morphology and microstructure. Detecting density changes may reveal the crystallization of amorphous particles and shed light on non-uniform magnesium distribution. This investigation deepens our understanding of sea urchin spine mechanics, offering insights for bio-inspired materials.

海胆棘刺拥有精巧复杂的三维结构，兼具高强度与柔韧性。这类优异的力学特性源于其独特的组分构成，其中包含非均匀的镁元素分布与无定形物质。先前研究通过对棘刺实施温和热处理，发现其柔韧性发生改变，这暗示了组分变化在其中发挥的关键作用。本研究采用纳米断层扫描（nanotomography）与原位退火（in-situ annealing）技术，追踪温度诱导下棘刺的形貌与微观结构变化。通过检测密度变化，可揭示无定形颗粒的结晶过程，并阐明镁元素的非均匀分布机制。此项研究深化了我们对海胆棘刺力学特性的认知，同时为仿生材料的研发提供了重要参考。