Luminescence property and magnetic resonance imaging of Gd2O3∶Tb3+ nanocrystals doped with Zn2+,Li+

• 作者: Rong Fu Yan-Yan Hu Hui-Na Qiao Chun-Lin Yang Hao Yin Mei-Gui Ou
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 2049-2058
• 页数: 10页
• 语种: 英文

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 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.