Biomimetic Control of Calcite Morphology with Homopolyanions.
Biomimetic Control of Calcite Morphology with Homopolyanions.
复制标题
用同聚阴离子仿生控制方解石形态。
DOI：
10.1021/cg900166u
复制
发表时间：
2009
影响因子：
3.8
通讯作者：
Stucky,GalenD
中科院分区：
文献类型：
--
作者：
McKenna,BrandonJ;Waite,JHerbert;Stucky,GalenD
生物矿化是一个复杂的过程，依赖于对溶液和界面性质的精确生理控制。尽管对这一过程进行了大量的研究，但人们对生物矿化的机理细节才刚刚开始了解，而添加剂的研究很少对矿化溶液中的化学条件进行广泛的研究。我们提出了一种基于三元图表的方法，该方法在全球范围内识别聚合物添加剂在矿化中的变化角色和影响。简单的聚阴离子被证明可以诱导出各种各样的形貌，每一种形貌都可以选择性地和可重复地制造出来。这种化学和物理分析还有助于确定选择性促进异质成核和受控合作组装的条件，在这里以高度组织的锥体的形式表现出来。以前已经使用双亲水嵌段共聚物合成了类似复杂形状的CaCO3。我们发现，仿生矿化过程是通过界面和前驱体模块的组装进行的，这些前驱体模块生成大的介晶，高度依赖于pH和衬底表面。
Biomineralization is an intricate process that relies on precise physiological control of solution and interface properties. Despite much research of the process, mechanistic details of biomineralization are only beginning to be understood, and studies of additives seldom investigate a wide space of chemical conditions in mineralizing solutions. We present a ternary diagram-based method that globally identifies the changing roles and effects of polymer additives in mineralization. Simple polyanions were demonstrated to induce a great variety of morphologies, each of which can be selectively and reproducibly fabricated. This chemical and physical analysis also aided in identifying conditions that selectively promote heterogeneous nucleation and controlled cooperative assembly, manifested here in the form of highly organized cones. Similar complex shapes of CaCO3have previously been synthesized using double hydrophilic block copolymers. We have found the biomimetic mineralization process to occur interfacially and by the assembly of precursor modules, which generate large mesocrystals with high dependence on pH and substrate surface.