Correlation between Color and Elasticity in Anomia ephippium Shells: Biological Design to Enhance the Mechanical Properties,ACS Applied Bio Materials

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Correlation between Color and Elasticity in Anomia ephippium Shells: Biological Design to Enhance the Mechanical Properties
ACS Applied Bio Materials ( IF 4.6 ) Pub Date : 2020-11-24 , DOI: 10.1021/acsabm.0c01255
Dhanya Radhakrishnan ₁ , Mengjing Wang ₁ , Kristie J Koski ₁

Affiliation

Anomia ephippium (Oyster) shell has an inorganic “pseudo nacre” microstructure that is colored (white, yellow, orange, and red) with varying concentrations of organic polyene pigments. Using Brillouin laser light scattering, we measured the elastic constants of A. ephippium and Abalone prismatic and nacre microstructures. We find a direct correlation between the polyene concentration and the measured elastic stiffnesses of A. ephippium shells, suggesting that polyene pigment enhances the shell’s primary function of mechanical protection. Further, Young’s, bulk, and shear moduli of A. ephippium shells are found to surpass that of ultrastrong Abalone nacre. By studying both microstructures, we demonstrate that pseudo nacre is stiffer than nacre. This work sheds light on the structure–property relation of pseudo nacre and organic constituents that may potentially be a paradigm shift for the future mimicry of super strong biomaterials.

中文翻译：

Anomia ephippium 壳的颜色与弹性的相关性：提高机械性能的生物设计

Anomia ephippium (Oyster) 壳具有无机“假珍珠层”微观结构，其颜色（白色、黄色、橙色和红色）与不同浓度的有机多烯颜料一起着色。使用布里渊激光散射，我们测量了A. ephippium和鲍鱼棱柱形和珍珠层微结构的弹性常数。我们发现多烯浓度与A. ephippium壳的测量弹性刚度之间存在直接相关性，这表明多烯颜料增强了壳的机械保护的主要功能。此外， A. ephippium的杨氏模量、体积模量和剪切模量贝壳被发现超过了超强鲍鱼珍珠层。通过研究这两种微观结构，我们证明了假珍珠层比珍珠层更硬。这项工作揭示了假珍珠层和有机成分的结构-性质关系，这可能是未来模仿超强生物材料的范式转变。

更新日期：2020-12-21

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