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Fabrication of bifunctional core-shell Fe3O4 particles coated with ultrathin phosphor layer

被引：21
作者：
Atabaev, Timur Sh [1 ]
Kim, Hyung-Kook [2 ]
Hwang, Yoon-Hwae [2 ]
机构：
[1] Seoul Natl Univ, Dept Phys & Astron, Seoul 151747, South Korea
[2] Pusan Natl Univ, Dept Nanomat Engn, Miryang 627706, South Korea
来源：
NANOSCALE RESEARCH LETTERS | 2013年 / 8卷
基金：
新加坡国家研究基金会;
关键词：
Nanocomposites; Bifunctional composite particles; Superparamagnetic behavior; MAGNETIC NANOPARTICLES; LUMINESCENT; NANOCOMPOSITES; SPHERES;
D O I：
10.1186/1556-276X-8-357
中图分类号：
TB3 [工程材料学];
学科分类号：
082905 [生物质能源与材料];
摘要：
Bifunctional monodispersed Fe3O4 particles coated with an ultrathin Y2O3:Tb3+ shell layer were fabricated using a facile urea-based homogeneous precipitation method. The obtained composite particles were characterized by powder X-ray diffraction, transmission electron microscopy (TEM), quantum design vibrating sample magnetometry, and photoluminescence (PL) spectroscopy. TEM revealed uniform spherical core-shell-structured composites ranging in size from 306 to 330 nm with a shell thickness of approximately 25 nm. PL spectroscopy confirmed that the synthesized composites displayed a strong eye-visible green light emission. Magnetic measurements indicated that the composite particles obtained also exhibited strong superparamagnetic behavior at room temperature. Therefore, the inner Fe3O4 core and outer Y2O3:Tb3+ shell layer endow the composites with both robust magnetic properties and strong eye-visible luminescent properties. These composite materials have potential use in magnetic targeting and bioseparation, simultaneously coupled with luminescent imaging.
引用
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页码：1 / 6
页数：6
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