期刊
ADVANCED FUNCTIONAL MATERIALS
卷 24, 期 8, 页码 1090-1099出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201302075
关键词
biomimetic apatites; crystal growth; total scattering methods; atomic force microscopy
类别
资金
- Fondazione Cariplo [2009-2446]
- Spanish MINECO
- Junta de Andalucia [MAT2011-28543, RMN1344]
- CEI-Biotic (UGR)
Bio-inspired apatite nanoparticles precipitated in the presence of citrate ions at increasing maturation times are characterized in terms of structure, size, morphology, and composition through advanced X-ray total scattering techniques. The origin of the platy crystal morphology, breaking the hexagonal symmetry, and the role ofcitrate ions is explored. By cross-coupling the size and shape information of crystal domains with those obtained by atomic force microscopy on multidomain nanoparticles, a plausible mechanism underlying the amorphous-to-crystal transformation is reconstructed. In the present study, citrate plays the distinct roles of inducing the platy morphology of the amorphous precursor and controlling the thickness of the Ca-deficient apatite nanocrystals. These findings can open new scenarios also in bone mineralization, where citrate might have a broader role to play than has been thought to date.
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