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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Luminescent and Magnetic Properties of Fe3O4@SiO2@Y2O3:Eu~(3+) Composites with Core-Shell Structure
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Luminescent and Magnetic Properties of Fe3O4@SiO2@Y2O3:Eu~(3+) Composites with Core-Shell Structure

机译：核壳结构Fe3O4 @ SiO2 @ Y2O3：Eu〜（3+）复合材料的发光和磁性

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摘要

Multifunctional Fe3O4@SiO2@Y2O3:Eu~(3+) com- posites were prepared with a facile solvothermal method followed by a subsequent heat treatment. Their structure and magnetic and luminescent properties were analyzed and discussed, Y2O3:Eu~(3+) phosphor as a shell was coated on the surface of Fe3O4@SiO2 as the core to form Fe3O4@SiO2@ Y2O3:Eu~(3+) composites. The particle size of the composites : 262.36 nm which consists of the magnetic core with about 210 nm in diameter and a silica shell with an average thickness of about 20 nm. It exhibits ferromagnetic behavior with the special saturation magnetization M_s of 12.62 emu/g, the negligible coercivity H_c, and remanence M_r at room temperature and exhibits a strong red emission peak originating from the electric—dipole transition ~5D0→~7F2 of Eu~(3+) ions at 611 nm. The current and potential biomedical uses include biological imaging, cell tracking, and magnetic bioseparation.
机译：用简便的溶剂热法制备多功能的Fe3O4 @ SiO2 @ Y2O3：Eu〜（3+）复合材料，然后进行后续热处理。分析和讨论了它们的结构，磁和发光性能，以Fe2O4 @ SiO2 @ Y2O3：Eu〜（3+）为表面，以Fe2O4 @ SiO2 @ Y2O3：Eu〜（3+）为壳层包覆了Y2O3：Eu〜（3+）荧光粉。复合材料。复合物的粒度：262.36nm，由直径约210nm的磁芯和平均厚度约20nm的二氧化硅壳组成。它表现出铁磁特性，其特殊饱和磁化强度M_s为12.62 emu / g，矫顽力H_c可忽略不计，在室温下的剩磁M_r，并且由于Eu-（〜 3+）离子在611 nm处。当前和潜在的生物医学用途包括生物成像，细胞跟踪和磁性生物分离。

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