Mineralization of Nacre-like Structures Mediated by Extrapallial Fluid on Pearl Nucleus
Mineralization of Nacre-like Structures Mediated by Extrapallial Fluid on Pearl Nucleus
复制标题
珠核外流体介导的类珍珠质结构的矿化
DOI：
10.1021/acs.cgd.7b01316
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发表时间：
2018-01-01
影响因子：
3.8
通讯作者：
Zhang, Rongqing
中科院分区：
文献类型：
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作者：
Liu, Chuang;Xu, Guangrui;Zhang, Rongqing
珍珠岩以其迷人的虹彩和优越的机械性能而闻名，这是因为它们在多个级别上具有层次化的有序结构。然而，构建这些有序结构的机制和自下而上合成珍珠层状材料的策略仍然缺乏。在这里，我们开发了一个体外碳酸钙沉积系统来模拟体内的生物矿化过程。值得注意的是，在珍珠贝的苍白质外液(EPF)存在下，珍珠核上形成了多层次的层状珍珠层状结构。特别是，直径为30-60 nm的文石纳米柱以平行图案聚集，并在每一层中组装成多边形片。此外，还观察到相邻层间的连接物，类似于天然珍珠层中的矿桥。因此，我们发现EPF在体外可以诱导珍珠核上珍珠层状结构的矿化，这将有助于更好地理解珍珠核层状结构的组装机制。
Nacre is renowned for its fascinating iridescence and superior mechanical properties owing to their hierarchically ordered structures at multiscale levels. However, mechanisms for constructing these ordered structures and bottom-up strategies to synthesize nacre-like materials are still lacking. Here, we developed a CaCO3 deposition system in vitro to mimic biomineralization process in vivo. Strikingly, in the presence of extrapallial fluid (EPF) from the pearl oyster Pinctada fucata, a multilevel layered nacre-like structure was formed on pearl nucleus. Particularly, aragonite nanocolumns with diameters of 30–60 nm aggregated by a parallel pattern and assembled into polygonal tablets in each layer. Moreover, linkers between adjacent laminated layers were observed, resembling mineral bridges in natural nacre. Thus, we found that EPF could induce the mineralization of nacre-like structures on pearl nucleus in vitro, which would be helpful for better understanding the mechanism for assembling layered struct...