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Crystallization in Aggregates of Calcium Phosphate Nanocrystals: A Logistic Model for Kinetics of Fractal Structure Development
Bian, Sha1; Du, Lin-Wei1; Gao, Yu-Xi2; Huang, Jian1; Gou, Bao-Di1; Li, Xiuhong3; Liu, Yi3; Zhang, Tian-Lan1; Wang, Kui1
刊名CRYSTAL GROWTH & DESIGN
2012-07-01
DOI10.1021/cg2016885
12期:7页:3481-3488
收录类别SCI
文章类型Article
WOS标题词Science & Technology
类目[WOS]Chemistry, Multidisciplinary ; Crystallography ; Materials Science, Multidisciplinary
研究领域[WOS]Chemistry ; Crystallography ; Materials Science
关键词[WOS]SMALL-ANGLE SCATTERING ; RESOLVED IN-SITU ; MASS FRACTALS ; PORODS LAW ; NUCLEATION ; SURFACE ; APATITES ; GROWTH ; TRANSFORMATION ; PARTICLES
英文摘要

Calcium 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.

语种英语
WOS记录号WOS:000305919700018
项目编号21071007
资助机构National Natural Science Foundation of China
引用统计
被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bjmu.edu.cn/handle/400002259/59470
专题北京大学药学院_化学生物学系
作者单位1.Peking Univ, Dept Biol Chem, Sch Pharmaceut Sci, Beijing 100191, Peoples R China
2.Chinese Acad Sci, Inst High Energy Phys, Key Lab Nucl Analyt Tech, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
推荐引用方式
GB/T 7714
Bian, Sha,Du, Lin-Wei,Gao, Yu-Xi,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):3481-3488.
APA Bian, Sha.,Du, Lin-Wei.,Gao, Yu-Xi.,Huang, Jian.,Gou, Bao-Di.,...&Wang, Kui.(2012).Crystallization in Aggregates of Calcium Phosphate Nanocrystals: A Logistic Model for Kinetics of Fractal Structure Development.CRYSTAL GROWTH & DESIGN,12(7),3481-3488.
MLA Bian, Sha,et al."Crystallization in Aggregates of Calcium Phosphate Nanocrystals: A Logistic Model for Kinetics of Fractal Structure Development".CRYSTAL GROWTH & DESIGN 12.7(2012):3481-3488.
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