【摘 要】
：
Gd2O3∶Tb3+ nanocrystal co-doped with Zn2+and Li+ was prepared by the combination of polyol and solid-phase methods.The synthesized nanoparticles were character
【机 构】
：
College of Materials and Metallurgy,University of Guizhou,Guiyang 550025,China;National Local Co-con
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Gd2O3∶Tb3+ nanocrystal co-doped with Zn2+and Li+ was prepared by the combination of polyol and solid-phase methods.The synthesized nanoparticles were characterized by X-ray diffraction (XRD),field emission scanning electron microscopy (FESEM),transmission electron microscopy (TEM),photoluminescence (PL)spectra and magnetic resonance imaging (MRI).The results revealed that both Gd2O3∶Tb3+/Zn2+ and Gd2O3∶Tb3+/Li+ had cubic unit structures with a spherical shape,and the fluorescence intensity of the nanoparticles reached a maximum at a doping concentration of 0.050 mmol％ for Zn2+ and 2 mol％ for Li+,respectively.In addition,the T1/T2 (longitudinal/transverse relaxation time)-weighted MRI signals got enhanced due to the increased longitudinal relaxivity (r1) and transverse relax-ivity (r2) after the doping by metal ions.Therefore,the materials reported here can be used for fluorescence and MR bimodal imaging,as tracers and for fluorescence detections.
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