In situ Raman spectroscopy investigation of bioactive glass reactivity: Simulated body fluid solution vs TRIS-buffered solution

Functional bioactive glass topcoats on hydroxyapatite coatings: Analysis of microstructure and in-vitro bioactivity

“…, which is assigned to the carbonate group, thus confirming that the precipitated HA was indeed carbonated [52]. The comparison between the spectra of the APS-HA coatings and the APS-HA/ SPS-BG_Ca (Fig.…”

“…10, thin traces). In the spectrum of the as-sprayed coating, three bands related to the BG_Ca glass were observed: a first band at , which is due to the symmetrical stretching of the PO 4 group [52]. Then, after soaking in SBF, the new peaks of the precipitated HCA progressively replaced the signals of the original glass and they steadily became sharper with increasing immersion time.…”

Comparison between Suspension Plasma Sprayed and High Velocity Suspension Flame Sprayed bioactive coatings

“…The micro-Raman spectra of the SPS and HVSFS samples (Fig. 8(c)) are accordingly analogous to those of SiO 2 -P 2 O 5 -based bioactive glasses [81,82], featuring broad bands at about 615 cm −1 , 1020 cm −1 and 1070 cm −1 , ascribable to vibrations modes of Si-O-Si bonds in silica tetrahedra [81,83], and an intense band at about 950 cm −1 , ascribable to the vibration of the PO 4 3− group [81,84]. In the spectra of the HVSFS samples, some sharp peaks, which refer to few crystallised areas, can be observed e.g.…”

Bioactive glass/hydroxyapatite composites: Mechanical properties and biological evaluation

“…4). In fact, besides the peak at~960 cm − 1 , which is ascribable to the totally symmetric stretching mode (ν 1 ) of the (PO 4 ) 3 − group, it is possible to observe two peaks at~600 cm −1 and~430 cm −1 , which are associated to the ν 4 and to the ν 2 bending modes of the (PO 4 ) 3− group, respectively [53,54]. Moreover, it is possible to observe a peak at~1070 cm −1 , which is ascribable to the symmetric stretching mode (ν 1 ) of the CO 3 groups [55].…”