Journal
JOURNAL OF CRYSTAL GROWTH
Volume 361, Issue -, Pages 217-224Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2012.09.003
Keywords
Biomaterials; crystallization; wool sphere-like structure; calcium carbonate; egg white
Funding
- Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials of the Southwest University of Science and Technology [11zxfk21]
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In this paper, shape-controlled crystallization and self-assembly of CaCO3 hierarchical architectures has been successfully synthesized via the gas diffusion method in egg white solution. Stepwise growth and assembly of CaCO3 nanoparticles has been observed from transition of an amorphous CaCO3 to the crystallization and stabilization of platelet-like nanoparticles and eventually, the wool sphere-like CaCO3 hierarchical architectures assembling of nanoparticles. The proteins binding on nanoparticle surfaces proved to regulate the growth of nanoparticles and subsequent assembly into hierarchical superstructures via electrostatic and dipole interactions. The samples were characterized by scanning electron microscopy (SEM), powder X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and nano mechanical Tester. The measured average elastic modulus and the hardness of calcium carbonate hybrid materials were 5.32 GPa and 0.1886 GPa by the nano-indenter test, respectively. (C) 2012 Elsevier B.V. All rights reserved.
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