Direct formation of nanophase hydroxyapatite on cathodically polarized electrodes

M Shirkhanzadeh

doi:10.1023/a:1008838813120

Direct formation of nanophase hydroxyapatite on cathodically polarized electrodes

J Mater Sci Mater Med. 1998 Feb;9(2):67-72. doi: 10.1023/a:1008838813120.

Author

M Shirkhanzadeh¹

Affiliation

¹ Department of Materials and Metallurgical Engineering, Queen's University, Kingston, Ontario, Canada K7L 3N6.

PMID: 15348909
DOI: 10.1023/a:1008838813120

Abstract

Ultrafine-grained, nanophase coatings of hydroxyapatite were synthesized by electrocrystallization from dilute electrolytes ([Ca]=6.1 x 10-4 M, [phosphate]=3.6 x 10-4 M) at pH values comparable with the biological pH. At these comparatively low supersaturations, hydroxyapatite is shown to be precipitated without the formation of a precursor phase. A description of the sequence of events occurring at the electrode-electrolyte interface is given to explain the mechanism involved in the direct formation of nanophase hydroxyapatite on polarized electrodes.