In the article, the effect of samarium ions doping on the spectroscopic and biological properties of 45S5 Bioglass® was presented. The luminescence spectra of doped glasses have been analyzed in the visible range under 405 nm laser excitation. The in vitro method for testing the apatite-forming ability of bioactive glasses was used. Crushed to 100μm fractions bioactive glasses were immersed in Simulated Body Fluid (SBF) prepared by the Kokubo method. The material was incubated at 37°C for 3 days and then the measurements of ions (Ca, Na, Si) release in SBF were carried out. The bioactivity test indicated that Sm3+ ions affect not only on the luminescent properties of the bioactive glasses but also their capability of creating the hydroxycarbonate-apatite (HCA) layer.
The article presents the use of Eu3+ ions as a spectroscopic probe to measure changes in glass structure without interfering with the tested material. The aim of the work is to obtain bioactive glass-ceramics structure with increased mechanical properties. Examined 45S5 Bioglass® was annealed at 620°C for 8h. XRD measurements indicate the formation of the glass-ceramics structure with nanocrystals (Na4CaSi3O9). Despite the additional heat treatment, the bioactivity of the glass has been preserved. The changes of luminescence profile of Eu3+ - doped glass was determined. Decreasing value of fluorescence intensity radio parameter after annealing indicates symmetry around europium ions and thus the arrangement of the glass structure.
In this work, thermal and spectroscopic properties of antimony-germanate glasses have been presented. Investigated glasses with the different molar content of alkalis (Na2O and K2O) have been co-doped with erbium and silver ions in order to obtain luminescence in the near-infrared region. Along with the increment of alkalis content, an increase of thermal stability parameter ΔT has been observed. High concentration of Na2O and K2O in the glassy matrix results in the presence of a plasmonic peak at the wavelength of 454 nm originating from large volume fraction of silver nanoparticles. Change of the luminescence parameters in the near-infrared region (Er3+: 4 I13/2→4I15/2) has been observed in the function of alkalis content in the glass matrix, which high concentration increases the volume fraction and size of silver nanoparticles promoting the energy transfer channel Er3+→Ag.
In the article, we showed the unconventional method to determine the degradation of Bioglass 45S5 doped with samarium ions used as an optical probe. The strongest emission at the wavelength of 601 nm has been observed under 405 nm laser excitation. We used the alternative method of fiber drawing from the 45S5 glass. Bioactive glass fiber was immersed in Sorensen buffer at temperature 37°C. In situ analysis of luminescence signal of glass fiber shown a decrease in intensity within 24 hours. This effect was connected with partial surface degradation of bioglass fiber.
The paper presents thermal and mechanical properties of bioactive S53P4 BoneAlive® and glass13-93 fibers. The aim is to fabricate bioactive glass fibers from the well-known bone reconstructive S53P4 and 13-93 glasses. Examined glasses were drawn using the modified rod-in-tube method. In this study tensile strengths for S53P4 and 13-93 fibers on mean diameters 39 and 34μm respectively were measured. Differential scanning calorimetry of this materials before and after drawing process was also investigated. Bioactive fibers have been considered for future medical application for reinforcing nanocomposites.