光致发光
材料科学
剩磁
矫顽力
纳米颗粒
扫描电子显微镜
磁性纳米粒子
分析化学(期刊)
发光
饱和(图论)
微观结构
球体
磁化
纳米技术
复合材料
磁场
化学
凝聚态物理
光电子学
色谱法
物理
天文
数学
量子力学
组合数学
作者
Tianhui Wu,Huayan Pan,Rubiao Chen,Dong Luo,Yanghui Li,Le Wang
标识
DOI:10.1016/j.jallcom.2016.07.294
摘要
In this paper, magnetic Fe3O4 hollow spheres based magnetic-fluorescent nanoparticles, hollow structured Fe3O4@Gd2O3:Eu3+, were synthesized through a homogeneous precipitation method. The microstructure, luminescence, and magnetic properties of the samples were investigated and discussed with the help of various analytic techniques including X-ray diffraction, scanning electron microscope, energy dispersive spectrometer, cathodelumincence mapping, photoluminescence spectra and vibrating sample magnetometer. The hollow spheres nanoparticles, emitting at 612 nm dominantly under the 254 nm excitation, exhibited the photoluminescence intensity 2.45 times higher than the solid sphere samples, due to the. hollow spheres structure. The hollow Fe3O4@Gd2O3:Eu3+ nanoparticles were spherical, and had a particle size of about 1400 nm in diameter. They also showed a saturation magnetization of 1.33 emu/g, a coercivity Hc of 160 Oe and a remanence of 0.05 emu/g at room temperature, the saturation magnetization of hollow spheres nanoparticles is higher than the solid sphere samples. The enhanced photoluminescence and magnetic properties of the hollow structured nanoparticles allow them to be used in biomedical applications.
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