Bioinspired Synthesis of Calcium Carbonate Hollow Spheres with a Nacre-Type Laminated Microstructure
writer：Dong, W.Y.; Cheng, H.X.; Yao, Y.A.; Zhou, Y. F.; Tong, G.S.; Yan, D.Y.; Lai, Y.J.; Li, W.
keywords：Hollow Spheres, Nacre-Type, Bioinspired
source：期刊
specific source：Langmuir 2011, 27, 366. http://pubs.acs.org/doi/pdf/10.1021/la1034799
Issue time：2011年
In this Article, we combine the
characters of hyperbranched polymers and the concept of double-hydrophilic block
copolymer (DHBC) to design a 3D crystal growth modifier, HPG-COOH. The novel
modifier can efficiently control the crystallization of CaCO3 from
amorphous nanoparticles to vaterite hollow spheres by a nonclassical
crystallization process. The obtained vaterite hollow spheres have a special
puffy dandelion-like appearance; that is, the shell of the hollow spheres is
constructed by platelet-like vaterite mesocrystals, perpendicular to the globe
surface. The cross-section of the wall of a vaterite hollow sphere is similar to
that of nacres in microstructure, in which platelet-like calcium carbonate
mesocrystals pile up with one another. These results reveal the topology effect
of the crystal growth modifier on biomineralization and the essential role of
the nonclassical crystallization for constructing hierarchical
microstructures.