Monodispersed Spherical Nanoparticles GdxSiyOz:Eu3+ for Magnetic Resonance Tomography and Optical Imaging

Abstract

The melt method is used for synthesizing monodispersed spherical silica nanoparticles Gd_x-Si_yO_z:Eu³⁺. The particle diameter is 450 nm, and the standard deviation does not exceed 5%. The nanoparticles have a line luminescence spectrum with a dominant band at 614 nm. The effect of a constant magnetic field up to 15 T on the intensity and shape of the luminescence spectra of Eu³⁺ ions is studied. It is shown that the obtained material has a stable photoluminescence, the intensity of which does not depend on the magnetic field in the entire studied range. The synthesized nanoparticles Gd_xSi_yO_z : Eu³⁺ are promising for use as a contrast agent for magnetic resonance tomography and luminescent marker.