Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 350, Issue 1, Pages 30-38Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2010.06.034
Keywords
Hydroxyapatite; F-substituted; Microcrystal; Shape-controlled synthesis; Chelating agent; Hollow
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Funding
- National Natural Science Foundation of China [30772117]
- Natural Science Foundation of Jiangsu Province [BK2007096]
- Research Foundation for Talented Scholars of Jiangsu University [08JDG052]
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We present a facile strategy for the shape-controlled synthesis of F-substituted hydroxyapatite (FHAp) microcrystals based upon using a combination of Na(2)EDTA and citric acid (CA). Novel, well-defined FHAp microcrystals of various shapes, such as hexagonal disks with predominant (0 0 0 1) faces, hexagonal shuttles, hexagonal prisms, icosahedrons, and hexagonal microrods with tunable aspect ratios, were fabricated. In particular, FHAp hollow microcrystals with tunable shapes were fabricated directly without using any additional template. The central features of our approach are the use of both Na(2)EDTA and CA as two distinct chelating reagents and the use of substitution ions (F-) itself as a growth inhibitor for the FHAp crystals. F- ions were found to play a critical role in the formation of hexagonally shaped FHAp microcrystals, and in the one-pot formation of hollow microcrystals, which relies on the addition order of F- ions in the synthesis. (C) 2010 Elsevier Inc. All rights reserved.
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