Nucleation and growth of calcium–phosphate on Ca-implanted titanium surface

Youtao Xie; Xuanyong Liu; Paul K. Chu; Chuanxian Ding

doi:10.1016/j.susc.2005.11.016

Nucleation and growth of calcium–phosphate on Ca-implanted titanium surface

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Overview

35 Scopus Citations

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Author(s)

Youtao Xie
Xuanyong Liu
Paul K. Chu
Chuanxian Ding

Detail(s)

Original language	English
Pages (from-to)	651-656
Journal / Publication	Surface Science
Volume	600
Issue number	3
Online published	19 Dec 2005
Publication status	Published - 1 Feb 2006

Link(s)

DOI	DOI https://doi.org/10.1016/j.susc.2005.11.016 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-31644441280&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(148e11d5-e30f-4b9f-9c28-1450cfa3705b).html

Abstract

Calcium phosphate formation on Ca-implanted titanium surfaces is studied. Experimental results show that octacalcium phosphate (OCP) is the more energetically favorable phase to precipitate on the positively charged Ca-implanted titanium surfaces compared to hydroxylapatite (HA), especially with the existence of a large amount of CO^2-₃ions. A solution-based cluster theory is employed to explain the process of the formation of calcium phosphate on the Ca-implanted titanium surfaces. Thermodynamic and kinetic calculations show that OCP is the kinetically favored phase to precipitate in the SBF solution than HA. The nucleation rate is much higher than that of HA, but HA is more stable thermodynamically. © 2005 Elsevier B.V. All rights reserved.