Zinc incorporation into hydroxylapatite

Yuanzhi Tang, Helen F. Chappell, Martin T. Dove, Richard J. Reeder, Young J. Lee

Research output: Contribution to journalArticlepeer-review

171 Citations (Scopus)

Abstract

By theoretical modeling and X-ray absorption spectroscopy, the local coordination structure of Zn incorporated into hydroxylapatite was examined. Density function theory (DFT) calculations show that Zn favors the Ca2 site over the Ca1 site, and favors tetrahedral coordination. X-ray absorption near edge structure (XANES) spectroscopy results suggest one dominant coordination environment for the incorporated Zn, and no evidence was observed for other Zn-containing phases. Extended X-ray absorption fine structure (EXAFS) fitting of the synthetic samples confirms that Zn occurs in tetrahedral coordination, with two P shells at ∼2.85-3.07 Å, and two higher Ca shells at ∼3.71-4.02 Å. These fit results are consistent with the most favored DFT model for Zn substitution in the Ca2 site.

Original languageEnglish
Pages (from-to)2864-2872
Number of pages9
JournalBiomaterials
Volume30
Issue number15
DOIs
Publication statusPublished - 2009 May

Keywords

  • Apatite
  • Bone
  • Density function theory
  • Hydroxylapatite
  • X-ray absorption spectroscopy
  • Zinc

ASJC Scopus subject areas

  • Bioengineering
  • Ceramics and Composites
  • Biophysics
  • Biomaterials
  • Mechanics of Materials

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