Microstructural investigation into calcium phosphate biomaterials by spatially resolved cathodoluminescence
✍ Scribed by J. Götze; R. B. Heimann; H. Hildebrandt; U. Gburek
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 271 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0933-5137
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✦ Synopsis
From cathodoluminescence (CL) investigations of synthetic and natural calcium phosphates it can be concluded that the CL of pure synthetic apatite is mainly characterized by intrinsic luminescence, whereas the luminescence of naturally occurring apatites is frequently activated by trace elements.
CL revealed internal structures within plasma-sprayed hydroxyapatite coatings which were not discernible by SEM-BSE imaging. However, cathodoluminescence microscopy alone can presently not be used in every case to characterize synthetic calcium phosphate biomaterials because of the dominant intrinsic blue CL emission. In the future, optimum results will likely be achieved by using a combination of CL microscopy and spectroscopy with other spatially resolved analytical methods such as SEM-BSE, SEM-CL or micro-Raman spectroscopy.
In the present study, different types of tetracalcium phosphate dental cements could be distinguished due to varying CL colours and CL spectra that are caused by a different content of impurity Mn. These results emphasize the advantages of spectral CL measurements for spatially resolved detection of trace elements in solids.
Ergebnisse von Kathodolumineszenz-(KL-) Untersuchungen synthetischer und natu Èrlicher Apatite zeigen, daû die KL synthetischer Apatite vorrangig durch intrinsische Lumineszenz gekennzeichnet ist, wa Èhrend die KL natu Èrlicher Apatite meist durch Spurenelemente aktiviert wird.
Mittels KL ko Ènnen Internstrukturen in plasmagespritzten Hydroxylapatit-Schichten sichtbar gemacht werden, die im REM-BSE nicht nachweisbar sind. Allerdings kann die KL-Mikroskopie aufgrund der dominierenden blauen intrinsischen Lumineszenz gegenwa Èrtig nicht als alleinige