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Crystallization in Aggregates of Calcium Phosphate Nanocrystals: A Logistic Model for Kinetics of Fractal Structure Development
Bian, S; Du, LW; Gao, YX; Huang, J; Gou, BD; Li, XH(李秀宏); Liu, Y(柳义); Zhang, TL; Wang, K
2012
Source PublicationCRYSTAL GROWTH & DESIGN
ISSN1528-7483
Volume12Issue:7
AbstractCalcium phosphate crystallization is of importance in medicine and materials science, and aggregation frequently happens at its early stage. Herein, we report a kinetic study of crystallization in particles of aggregated nanocrystals of calcium phosphate by in situ synchrotron small-angle X-ray scattering. The particles were random fractal aggregates, having diameters of 20-60 nm and comprising structural units of 2.5 nm in dimension. With the application of a logistic model, the structural changes of the particles were characterized by the successive developments of mass and surface fractal dimensions. The rate constant of mass fractal development was found to be 0.052 h(-1), corresponding to the generation of crystallites on the pre-existing seeds inside an aggregate. These newly formed nanocrystals then detached from their seeds and fell into the voids. Afterward, the surface fractal structure developed at a rate of 0.11 h(-1), making the particle surface less rough. During this period, a transition layer of 1.2-nm thickness emerged between a particle and the surrounding solution. Our findings present an advance toward understanding the crystallization in particles of aggregated nanocrystals and would be beneficial for preparing nanocrystals and recognizing the roles of other substances (such as proteins and metals) in both biological and synthetic systems.
Language英语
Funding Project应物所项目组
WOS IDWOS:000305919700018
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13114
Collection中科院上海应用物理研究所2011-2020年
Recommended Citation
GB/T 7714
Bian, S,Du, LW,Gao, YX,et al. Crystallization in Aggregates of Calcium Phosphate Nanocrystals: A Logistic Model for Kinetics of Fractal Structure Development[J]. CRYSTAL GROWTH & DESIGN,2012,12(7).
APA Bian, S.,Du, LW.,Gao, YX.,Huang, J.,Gou, BD.,...&Wang, K.(2012).Crystallization in Aggregates of Calcium Phosphate Nanocrystals: A Logistic Model for Kinetics of Fractal Structure Development.CRYSTAL GROWTH & DESIGN,12(7).
MLA Bian, S,et al."Crystallization in Aggregates of Calcium Phosphate Nanocrystals: A Logistic Model for Kinetics of Fractal Structure Development".CRYSTAL GROWTH & DESIGN 12.7(2012).
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