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Titania effect on the bioactivity of silicate bioactive glasses
Author(s) -
Magyari Klára,
One Roxana,
Tódor IstvánSzabolcs,
Baia Monica,
Simon Viorica,
Simon Simion,
Baia Lucian
Publication year - 2016
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.4951
Subject(s) - apatite , raman spectroscopy , simulated body fluid , materials science , amorphous solid , scanning electron microscope , silicate , phase (matter) , fourier transform infrared spectroscopy , mineralogy , bioactive glass , chemical engineering , full width at half maximum , analytical chemistry (journal) , crystallography , chemistry , optics , composite material , optoelectronics , chromatography , organic chemistry , physics , engineering
This study reports about the influence of titania on the structure and bioactivity of 60SiO 2 ⋅ (32 − x )CaO · 8P 2 O 5 · x TiO 2 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 TiO 2 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 TiO 2 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.