ULTRASTRUCTURAL ANALYSIS OF HYDROXYAPATITE NANO-PARTICLES SYNTHESIZED UNDER DIFFERENT INITIAL PH CONDITIONS USING HIGH-RESOLUTION TRANSMISSION ELECTRON MICROSCOPY
- Resource Type
- Journal Article
- Authors
- Hideyuki Yoshimura; Mamoru Aizawa; Toshiisa Konishi; Zhi Zhuang
- Source
- Phosphorus Research Bulletin. 2012, 26:81
- Subject
- Hydroxyapatite nano-particle
crystal morphology
high-resolution transmission electron microscopy
hydrothermal process
ultrastructure
- Language
- English
- ISSN
- 0918-4783
1882-2363
Hydroxyapatite (HAp) nano-particles were synthesized by a hydrothermal process under different initial pH conditions (pH 9.00∼10.50). All resulting particles were identified to be single-phase HAp. With increasing of initial pH values, Ca/P molar ratios increased closely to that of the stoichiometric HAp value of 1.67. The morphologies and ultrastructures of these particles were observed using high-resolution transmission electron microscopy. These results indicated that the resulting particles were fiber-shaped single crystals with preferred orientation to the a-plane at low pH values. However, at high pH values, the resulting particles were plate-shaped polycrystalline crystals with preferred orientation to the c-plane.