Growth of Nacre Biocrystals by Self-Assembly of Aragonite Nanoparticles with Novel Subhedral Morphology
Growth of Nacre Biocrystals by Self-Assembly of Aragonite Nanoparticles with Novel Subhedral Morphology
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通过具有新型亚面形形态的文石纳米颗粒自组装生长珍珠质生物晶体
DOI：
10.3390/cryst10010003
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发表时间：
2020-01-01
期刊：
影响因子：
2.7
通讯作者：
Zhang, Gangsheng
中科院分区：
文献类型：
--
作者：
Gao, Ruohe;Wang, Rize;Zhang, Gangsheng
珍珠层长期以来一直作为生物矿化和仿生材料领域的研究模型。人们普遍认为其基本成分文石生物晶体（即片剂）是通过纳米颗粒附着途径形成的。然而，片剂中纳米颗粒形态和排列的细节仍然存在争议。在这里，我们使用场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）观察了不同生长阶段的生长片剂的纳米结构，发现：（1）第一个可检测到的片剂看起来像一根棒子； (2)由宽度为160-180 nm的文石单晶制成的亚面体纳米颗粒(即，部分由晶面界定，部分由不规则的非晶面界定)组成的片剂； （3）这些纳米颗粒在方向上是有序的，但在位置上是无序的，从顶视图和侧视图中分别产生独特的亚面体和拼图状图案。简而言之，我们通过具有新颖的亚面形形态的文石纳米粒子的自组装直接观察了珍珠质生物晶体的生长。
Nacre has long served as a research model in the field of biomineralization and biomimetic materials. It is widely accepted that its basic components, aragonite biocrystals, namely, tablets, are formed by the nanoparticle-attachment pathway. However, the details of the nanoparticle morphology and arrangement in the tablets are still a matter of debate. Here, using field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM), we observed the nanostructure of the growing tablets at different growth stages and found that: (1) the first detectable tablet looked like a rod; (2) tablets consisted of subhedral nanoparticles (i.e., partly bounded by crystal facets and partly by irregular non-crystal facets) that were made of aragonite single crystals with a width of 160-180 nm; and (3) these nanoparticles were ordered in orientation but disordered in position, resulting in unique subhedral and jigsaw-like patterns from the top and side views, respectively. In short, we directly observed the growth of nacre biocrystals by the self-assembly of aragonite nanoparticles with a novel subhedral morphology.