Abstract
Calcium phosphate was deposited on carbon materials using a sonoelectrochemical method in an electrolyte containing calcium and phosphate ions. The effect of electrolyte concentration on sonoelectrochemically deposited calcium phosphate coatings was investigated and the underlying deposition mechanisms were discussed. The morphology, size and composition of the crystalline deposits changed with the electrolyte concentration. A mixture of plate, sphere and needle-like deposits was obtained at Ca2+ ion concentrations greater than 16 mM, however needle-like hydroxyapatite (HA) was obtained at lower Ca2+ concentrations. Analysis revealed that the sonoelectrochemical deposition of calcium phosphate consists of two processes - nucleation and crystal growth. The results suggest that the homogeneous nucleation of calcium phosphates in solution, followed by their absorption onto the carbon surface may account for the mechanism of coating observed at higher ionic concentrations. At lower concentrations, heterogeneous nucleation occurs on the surface of the carbon fibres, followed by the development of islands of crystal growth. The lower ionic concentration was shown to favour the generation of hydroxyapatite on carbon-based materials.
| Original language | English |
|---|---|
| Pages (from-to) | 2845-2850 |
| Number of pages | 6 |
| Journal | Journal of Materials Science: Materials in Medicine |
| Volume | 19 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Aug 2008 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Biophysics
- Bioengineering
- Chemical Engineering(all)
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Sonoelectrochemical deposition of calcium phosphate coatings on carbon materials - Effect of electrolyte concentration. / Han, H. M.; Phillips, G. J.; Mikhalovsky, S. V.; FitzGerald, S.; Lloyd, A. W.
In: Journal of Materials Science: Materials in Medicine, Vol. 19, No. 8, 08.2008, p. 2845-2850.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Sonoelectrochemical deposition of calcium phosphate coatings on carbon materials - Effect of electrolyte concentration
AU - Han, H. M.
AU - Phillips, G. J.
AU - Mikhalovsky, S. V.
AU - FitzGerald, S.
AU - Lloyd, A. W.
PY - 2008/8
Y1 - 2008/8
N2 - Calcium phosphate was deposited on carbon materials using a sonoelectrochemical method in an electrolyte containing calcium and phosphate ions. The effect of electrolyte concentration on sonoelectrochemically deposited calcium phosphate coatings was investigated and the underlying deposition mechanisms were discussed. The morphology, size and composition of the crystalline deposits changed with the electrolyte concentration. A mixture of plate, sphere and needle-like deposits was obtained at Ca2+ ion concentrations greater than 16 mM, however needle-like hydroxyapatite (HA) was obtained at lower Ca2+ concentrations. Analysis revealed that the sonoelectrochemical deposition of calcium phosphate consists of two processes - nucleation and crystal growth. The results suggest that the homogeneous nucleation of calcium phosphates in solution, followed by their absorption onto the carbon surface may account for the mechanism of coating observed at higher ionic concentrations. At lower concentrations, heterogeneous nucleation occurs on the surface of the carbon fibres, followed by the development of islands of crystal growth. The lower ionic concentration was shown to favour the generation of hydroxyapatite on carbon-based materials.
AB - Calcium phosphate was deposited on carbon materials using a sonoelectrochemical method in an electrolyte containing calcium and phosphate ions. The effect of electrolyte concentration on sonoelectrochemically deposited calcium phosphate coatings was investigated and the underlying deposition mechanisms were discussed. The morphology, size and composition of the crystalline deposits changed with the electrolyte concentration. A mixture of plate, sphere and needle-like deposits was obtained at Ca2+ ion concentrations greater than 16 mM, however needle-like hydroxyapatite (HA) was obtained at lower Ca2+ concentrations. Analysis revealed that the sonoelectrochemical deposition of calcium phosphate consists of two processes - nucleation and crystal growth. The results suggest that the homogeneous nucleation of calcium phosphates in solution, followed by their absorption onto the carbon surface may account for the mechanism of coating observed at higher ionic concentrations. At lower concentrations, heterogeneous nucleation occurs on the surface of the carbon fibres, followed by the development of islands of crystal growth. The lower ionic concentration was shown to favour the generation of hydroxyapatite on carbon-based materials.
UR - http://www.scopus.com/inward/record.url?scp=44949105413&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=44949105413&partnerID=8YFLogxK
U2 - 10.1007/s10856-008-3411-8
DO - 10.1007/s10856-008-3411-8
M3 - Article
VL - 19
SP - 2845
EP - 2850
JO - Journal of Materials Science: Materials in Medicine
JF - Journal of Materials Science: Materials in Medicine
SN - 0957-4530
IS - 8
ER -