2009年7月
Surface, Interface, and Bulk Structure of Borate Containing Apatitic Biomaterials
CHEMISTRY OF MATERIALS
- ,
- ,
- ,
- 巻
- 21
- 号
- 14
- 開始ページ
- 3102
- 終了ページ
- 3109
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1021/cm900204q
- 出版者・発行元
- AMER CHEMICAL SOC
Nuclear magnetic resonance (NMR) has been used for a detailed investigation of the borate incorporation in apatitic biomaterials prepared by high-temperature solid-state reaction sintering. The NMR data clearly show that crystalline hydroxyapatite (HAp) does exist, but it contains only about 30% of the entire phosphate content of the sample. The main phosphate content of about 70% forms a disordered calcium phosphate phase (BCaP) that accommodates the borate units in two structurally different trigonal BO(3)(3-) groups besides some minor linear BO(2)(-) units. The average chemical composition of BCaP was estimated from the NMR spectra. Furthermore, a structural model of these particles is proposed, where HAp forms the crystalline core of these crystals covered by the disordered BCaP, suggesting that the BCaP phase is responsible for the adhesion properties of organic molecules like proteins and not HAp that is the only significant crystalline phase (XRD). Furthermore, the presence of an interface between HAp and BCaP is discussed based on various NMR experiments, including a triple-resonant (11)B-(31)P cross-polarization edited (31)P NMR spectrum with subsequent (31)P{(1)H} REDOR (Rotational Echo DOuble Resonance) dephasing,
- リンク情報
- ID情報
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- DOI : 10.1021/cm900204q
- ISSN : 0897-4756
- CiNii Articles ID : 80020479192
- Web of Science ID : WOS:000268174400015