1D oriented attachment of calcite nanocrystals: formation of single-crystalline rods through collision
1D oriented attachment of calcite nanocrystals: formation of single-crystalline rods through collision
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DOI：
10.1039/c6ra09452j
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发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Imai, Hiroaki
中科院分区：
文献类型：
--
作者：
Takasaki, Mihiro;Kimura, Yuki;Imai, Hiroaki
方解石是生物矿物的主要成分，其定向附着已在环境温度下的水系统中得到实验证明。通过 Ca(OH)(2) 的碳酸化制备了尺寸类似于 50 nm 的方解石纳米块。在环境温度和碱性条件（pH 类似于 12）下诱导方解石纳米块的一维 (1D) 排列，然后通过 c 方向的伸长形成超过 1 mm 的单晶棒。通过增加系统搅拌下的碰撞频率，可以增强纳米级构件的定向附着，但在中性 pH 条件下会因进一步碳酸化而停止。碳酸钙纳米晶体的可控非经典生长模式将为水溶液中的生物成因和仿生矿化提供重要信息。
The oriented attachment of calcite, which is a main component of biominerals, was experimentally demonstrated in an aqueous system at ambient temperatures. Calcite nanoblocks similar to 50 nm in size were prepared by carbonation of Ca(OH)(2). One-dimensional (1D) alignment of the calcite nanoblocks was induced at ambient temperatures under a basic condition (pH similar to 12), and single-crystalline rods over 1 mm were then formed through elongation in the c direction. The oriented attachment of the nanoscale building blocks was enhanced by increasing the collision frequency with stirring of the system, but was halted under a neutral pH condition with further carbonation. The controllable non-classical growth mode of calcium carbonate nano-crystals would provide significant information for biogenic and biomimetic mineralization in aqueous solutions.