Titania effect on the bioactivity of silicate bioactive glasses. (30th May 2016)

• Record Type: Journal Article
• Authors: Magyari, Klára; One, Roxana; Tódor, István‐Szabolcs; Baia, Monica; Simon, Viorica; Simon, Simion; Baia, Lucian
• Other Names: Popp Jürgen guestEditor.; Schlücker Sebastian guestEditor.; Schmitt Michael guestEditor.; Hofkens Johan guestEditor.; Roeffaers Maarten guestEditor.; Kiefer Johannes guestEditor.; Moger Julian guestEditor.
• Is Part Of: Journal of Raman spectroscopy. Volume 47:Number 9(2016)
• Page Start: 1102
• Page End: 1108
• Publication Date: 2016-05-30
• Subjects: biomaterials -- FT‐IR -- Raman -- FWHM -- XRD; Raman spectroscopy -- Periodicals; 535.846
• DOI: 10.1002/jrs.4951
• Languages: English
• ISSNs: 0377-0486

Abstract

Abstract : This study reports about the influence of titania on the structure and bioactivity of 60SiO2 ⋅ (32 − x )CaO · 8P2 O5 · x TiO2 glasses with 0 ≤ x ≤ 12 mol%. In order to analyse the evolution of the apatite structure self‐assembled on the glass surface after immersion in simulated body fluid, a complementary approach of different techniques was applied such as X‐ray diffraction, Fourier transform infrared spectroscopy (FT‐IR), scanning electron microscopy and Raman spectroscopy. It was evidenced that the crystalline hydroxyapatite amount and the size of the nanostructured apatite phase, i.e. crystalline and amorphous one, decrease with the rise of TiO2 content. FT‐IR spectra recorded in reflection mode showed the increase of the apatite‐like structure amount as the titania content became higher. On the other hand, the behaviour of the full width at half maximum of the most intense Raman signal originating from the apatite‐like structure confirms the size decrease of the nanostructured apatite phase with the progressive addition of TiO2 and shows the existence of a less ordered apatite‐like structure. The herein presented investigation demonstrates that the FWHM of the Raman signal combined with the FT‐IR data recorded in reflection mode can be used as key spectral indicators for elucidating the evolution of apatite‐like structures developed on the bioactive material surface. Copyright © 2016 John Wiley & Sons, Ltd. Abstract : The full width at half maximum of the Raman signal combined with the Fourier transform infrared spectroscopy data recorded in reflection mode can be used to rapidly clarify the assessment of the apatite‐like structure developed onto material surface.