FABRICATON AND OPTICAL PROPERTIES OF Gd2O3:Eu3+ NANOSPHERE FOR BIOMEDICAL APPLICATIONS
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Received: 09/09/20                Revised: 02/10/20                Published: 27/11/20Abstract
In this work, Gd2O3:Eu3+ was synthesized by a multi-step chemical method with different molar concentration ratios [Eu3+]/[Gd3+] of 3, 4, 5, 6 and 7%. The synthesized products were annealed at different temperatures of 650, 850 and 900 oC. The as-synthesized and annealed samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), and differential thermal analysis (DTA) techniques. The optical properties of the synthesized samples were investigated by photoluminescence spectroscopy at room temperature. The results indicate that the synthesized Gd2O3:Eu3+ have highly spherical uniform morphology with the size range of 340 - 440 nm. The samples produced red luminescence and the strongest emission peak at 611 nm corresponding to 5D0–7F2 transition of Eu3+ ions. The synthesized Gd2O3:6%Eu3+ annealing at 850 oC exhibited strong luminescence, this is a promising materials in labeling and identification for biomedical applications.
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