Biomimetic deposition of calcium phosphates on oxides soaked in a simulated body fluid

Satoshi Hayakawa, Akiyoshi Osaka

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

31P magic-angle-spinning (MAS) NMR spectra were measured for several oxides, such as Al2O3, SiO2, TiO2 and Ta2O5 which were treated with TaCl5-free H2O2 solutions and TaCl5-containing H2O2 solutions and soaked in a simulated body fluid (Kokubo solution; pH = 7.4) for 7 days. The chemical states of phosphate anions deposited on these oxides were determined. A 31P MAS-NMR peak at a chemical shift ca. 3 ppm was observed in the spectra of Ta2O5 and for the other oxides when they were treated with the TaCl5-containing H2O2 solution. Without the treatment with the TaCl5-containing H2O2 solution no 31P MAS-NMR peaks were observed in the spectra of the oxides. The 31P chemical shift, ca. 3 ppm, indicated that orthophosphate anions, PO43- as found in hydroxyapatite and a cortical bone (rabbit) were adsorbed on the oxides. The surface of Ta2O5 particles and the oxides treated with the TaCl5-containing H2O2 solution induced the deposition of apatite. We concluded that the surface Ta(V) species supported on the oxides induced a bone-like apatite nucleus, even though the base oxides did not deposit apatite.

Original languageEnglish
Pages (from-to)409-415
Number of pages7
JournalJournal of Non-Crystalline Solids
Volume263
DOIs
Publication statusPublished - Mar 1 2000

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Calcium Phosphates
calcium phosphates
body fluids
Body fluids
biomimetics
Calcium phosphate
Biomimetics
Oxides
oxides
Apatites
Magic angle spinning
Apatite
apatites
metal spinning
Nuclear magnetic resonance
Chemical shift
nuclear magnetic resonance
bones
Anions
chemical equilibrium

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Biomimetic deposition of calcium phosphates on oxides soaked in a simulated body fluid. / Hayakawa, Satoshi; Osaka, Akiyoshi.

In: Journal of Non-Crystalline Solids, Vol. 263, 01.03.2000, p. 409-415.

Research output: Contribution to journalArticle

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