期刊
MICROSCOPY AND MICROANALYSIS
卷 14, 期 5, 页码 433-438出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S1431927608080744
关键词
hydroxyapatite; HRTEM; focal series; nanoparticles
资金
- LNLS (Laboratorio Nacional de Luz Sincrotron [Brazilian Synchrotron Light Laboratory])
- FAPESP (Fundacao de Apoio a Pesquisa do Estado de Sao Paulo [The State of Sao Paulo Research Foundation]) [06/00351-4]
Crystalline properties of synthetic nanostructured hydroxyapatite (n-HA) were studied using high-resolution transmission electron microscopy. The focal-series-restoration technique, obtaining exit-plane wave-function and spherical aberration-corrected images, was successfully applied for the first time in this electron-beam-susceptible material. Multislice simulations and energy dispersive X-ray spectroscopy were also employed to determine unequivocally that n-HA particles of different size preserve stoichiometric HA-like crystal structure. n-HA particles with sizes of twice the HA lattice parameter were found. These results can be used to optimize n-HA sinterization parameters to improve bioactivity.
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