Thermoluminescence as a probe in bioactivity studies; the case of 58S sol-gel bioactive glass
Yükleniyor...
Dosyalar
Tarih
2011-10-05
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
IOP Publishing Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The formation of a carbonated hydroxyapatite (HCAp) layer on the surface of bioactive materials is the main reaction that takes place upon their immersion in physiological fluids. To date, all techniques used for the identification of this HCAp formation are rather time consuming and not well suited to detailed and rapid monitoring of changes in the bioactivity response of the material. The aim of this work is to explore the possibility of using thermoluminescence (TL) for the discrimination between different bioactive responses in the case of the 58S bioactive glass. Results provided strong indications that the 110 degrees C TL peak of quartz can be used effectively in the study of the bioactive behaviour of 58S bioactive glass, since it is unambiguously present in all samples and does not require deconvolution analysis. Furthermore, the intensity of the 110 degrees C TL peak is proven to be very sensitive to the different bioactive responses, identifying the loss of silica which takes place at the first stages of the sequence. The discontinuities of the 110 degrees C TL peak intensity plot versus immersion time at 8 and 1440 min provide experimental indications regarding the timescale for both the beginning of amorphous CaP formation as well as the end of crystalline hydroxyl-apatite formation respectively, while the spike in the sensitization of the 110 degrees C TL peak, which was observed for immersion times ranging between 20 and 40 min, could be an experimental feature indicating the beginning of the crystalline HCAp formation.
Açıklama
Anahtar Kelimeler
Optically stimulated luminescence, Curve deconvolution functions, Phase-transitions, Quartz, Kinetics, Peak, TL, Bioactive glass, Phosphate minerals, Glass scaffolds, 58S bioactive glass, Bioactive material, Carbonated hydroxyapatites, Deconvolution analysis, Immersion time, Peak intensity, Physiological fluids, Rapid monitoring, Techniques used, Time-scales, Apatite, Crystalline materials, Hydroxyapatite, Thermoluminescence
Kaynak
Journal of Physics D-applied Physics
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
44
Sayı
39
Künye
Polymeris, G. S., Goudouri, O. M., Kontonasaki, E., Paraskevopoulos, K. M., Tsirliganis, N. C., & Kitis, G. (2011). Thermoluminescence as a probe in bioactivity studies; the case of 58S sol–gel bioactive glass. Journal of Physics D: Applied Physics, 44(39), 1-8. doi:10.1088/0022-3727/44/39/395501
