三角帆蚌贝壳珍珠层动态微结构及其特异的虹彩效应  

Dynamic Microstructural Characteristics and Novel Iridescent Effect of the Nacre in Hyriopsis Cumingii

作　　者：邵惠萍 吴静怡 罗建英 汪鑫燕 严俊 SHAO Huiping;WU Jingyi;LUO Jianying;WANG Xinyan;YAN Jun(Zhejiang Fangyuan Test Group Co.,Ltd,Hangzhou 310013,China;Wenzhou Institute of Science and Technology,Zhejiang University of Technology,Wenzhou 325024,China)

机构地区：[1]浙江方圆检测集团股份有限公司,浙江杭州310013 [2]浙江工业大学温州科学技术研究院,浙江温州325024

出　　处：《安庆师范大学学报（自然科学版）》2020年第2期87-92,共6页Journal of Anqing Normal University(Natural Science Edition)

基　　金：温州市基础性农业科技项目(N20190008);浙江省质监公益科研项目(20170206);浙江方圆检测集团自立科研项目(2019-ZL-01)。

摘　　要：通过场发射扫描电镜(FE-SEM)对三角帆蚌贝壳内表面上呈现不同虹彩特征的典型区域进行微结构的形貌对比观察。结果表明:靠近贝壳内表面的珍珠层中单一的文石板片厚度差异是内表面上不同区域呈现不同的虹彩特征的直接原因,且随着文石板片厚度的增加,虹彩色逐渐消失,且贝壳内表面虹彩的形成机制应基于珍珠层表面多层板片结构的光学衍射。同时,三角帆蚌贝壳珍珠层表面上未成熟的文石板片重叠交互生长,珍珠层同一水平面上存在成熟与未成熟的文石板片毗连共生,进一步发现在珍珠层中单一的文石板片的厚度在贝壳三维结构方向上存在动态渐变特征。课题研究为探究生物贝壳珍珠层的矿化形成过程提供最直观的佐证,并为仿生制备特异的光学与力学性能材料提供新的设计思路与制备模板。Using field emission scanning electron microscopy(FE-SEM),we investigate the iridescent and microstructural characteristics of freshwater Hyriopsis cumingii.Our results indicate that vivid iridescence appears only on the part of the inner surface of Hyriopsis cumingii shell and the direct cause is the difference in thickness of the individual aragonite platelet.The iridescent effect decreases when the thickness of the individual aragonite platelet in nacre increases and the formation mechanism of iridescence on the inner surface of the shell mainly arises from Bragg diffraction of lights from the multilayer plate structure.Concurrently,immature aragonite slabs on the surface of Hyriopsis cumingii overlap and grow interactively,while the thickness of the individual aragonite platelet gradually decreases from the prismatic layer to the inner surface of the shell in a direction vertical to the inner surface and has a dynamic gradient in the direction of the three-dimensional structure of the shell.These newly identified structural properties of the Hyriopsis cumingii enhance our understanding of the formation mechanism of nacreous iridescence and could be helpful in the design and synthesis of advanced optical materials.

关 键 词：扫描电镜 虹彩 微结构 文石板片 动态结构 

分 类 号：S911[农业科学—水产科学]