Aragonite Nanorod Arrays through Molecular Controlled Growth on Single-Crystalline Substrate and Polysaccharide Surface
Aragonite Nanorod Arrays through Molecular Controlled Growth on Single-Crystalline Substrate and Polysaccharide Surface
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DOI：
10.1021/acs.cgd.6b00237
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发表时间：
2016-06
影响因子：
3.8
通讯作者：
Monami Suzuki;Y. Oaki;H. Imai
中科院分区：
文献类型：
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作者：
Monami Suzuki;Y. Oaki;H. Imai
我们通过在过饱和溶液中由酸性多糖海藻酸盐控制的晶体生长来制备成簇的文石纳米棒。在文石单晶的(001)表面生长了高度有序的c轴细长的文石纳米棒∼，直径为100 nm，对可溶性多糖具有特异性吸附作用。以不溶于水的壳聚糖作为亚稳相成核的模板，得到了由有序的文石纳米棒组成的自支撑薄膜。通过重复晶体生长，改善了薄膜中有序棒的取向。通过分子控制晶体生长对晶型、取向和形态的并行控制，提供了亚稳态碳酸钙晶体的仿生分层结构。
We produced bunched aragonite nanorods through crystal growth controlled by an acidic polysaccharide, alginate, in a supersaturated solution. The highly ordered arrays of c-axis-elongated aragonite nanorods ∼100 nm in diameter were grown on the (001) surface of a single-crystalline aragonite substrate with specific adsorption of the soluble polysaccharide. Freestanding films consisting of ordered aragonite nanorods were obtained by using an insoluble polysaccharide, anhydrous chitosan, as a template for nucleation of the metastable phase. The orientation of the ordered rods in the films was improved by repetition of the crystal growth. Parallel control of the polymorphism, orientation, and morphology by molecular controlled crystal growth provides biomimetic hierarchical architectures of the metastable calcium carbonate crystals.