کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1608399 1516248 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural characterization, optical properties and in vitro bioactivity of mesoporous erbium-doped hydroxyapatite
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Structural characterization, optical properties and in vitro bioactivity of mesoporous erbium-doped hydroxyapatite
چکیده انگلیسی
We report the successful synthesis of mesoporous erbium doped hydroxyapatite (Er-HA, Ca10−xEr2x/3□x/3(PO4)6(OH)2) by using a rapid and efficient microwave assisted wet precipitation method. Characterization techniques like X-ray diffraction (XRD), Fourier transform infra-red (FTIR), X-ray fluorescence spectrometer (XRF), Brunauer, Emmett and Teller (BET) and transmission electron microscopy (TEM) were used to determine lattice parameters, particle size, degree of crystallinity, elemental composition, surface area and morphology of Er-HA. Results confirmed the formation of crystalline Er-HA having crystallite size of 25 nm with spherical and rod like morphology, while the TEM analysis confirmed the mesoporous nature of the particles. Optical spectra of Er-HA contained seven electron transitions, whereas blue shift in the energy band gap (Eg) was observed upon increase in Er3+ content. The photoluminescence (PL) spectra contained green and red emissions. In vitro bioactivity study conducted in SBF revealed that the incorporation of Er3+ ions into HA structure lead to the faster discharge of Er3+ ions resulting in intense growth of apatite grains on the surface of the Er-HA pellets with Ca/P ratio of 1.72.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 645, 5 October 2015, Pages 478-486
نویسندگان
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