A new Science study has revealed the remarkable architecture underlying the knobby starfish’s strong, light skeleton. The findings could aid in the design of similarly engineered synthetic materials. ScienceResearch
Cellular solids such as foams or honeycombs can exhibit excellent stiffness or toughness with minimal weight. Yang. examined ossicles, calcareous skeletal elements from the skeletons of knobby starfish . The authors show that the structure consists of a dual-scale microlattice with both atomic-level calcite and micro-level diamond-triply periodic minimal surface, as well as gradients in composition and atomic level defects.
While these materials are often based on polycrystalline or amorphous constituents, here we report an unusual dual-scale, single-crystalline microlattice found in the biomineralized skeleton of the knobby starfish,. This structure has a diamond-triply periodic minimal surface geometry , the [111] direction of which is aligned with the-axis of the constituent calcite at the atomic scale.
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