Synthesis and characterization of core/shell Fe3O4/ZnSe fluorescent magnetic nanoparticles

被引：9
|
作者：
Vargas, Jose M. [1 ]
McBride, Amber A. [1 ]
Plumley, John B. [1 ]
Fichou, Yann [1 ]
Memon, Tosifa A. [1 ]
Shah, Vichiksha [1 ]
Cook, Nathaniel C. [1 ]
Akins, Brian A. [1 ]
Rivera, Antonio C. [1 ]
Smolyakov, Gennady A. [1 ]
O'Brien, James R. [2 ]
Adolphi, Natalie L. [3 ]
Smyth, Hugh D. C. [4 ]
Osinski, Marek [1 ]
机构：
[1] Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106 USA
[2] Quantum Design, San Diego, CA 92121 USA
[3] Univ New Mexico, Hlth Sci Ctr, Albuquerque, NM 87131 USA
[4] Univ Texas Austin, Coll Pharm, Austin, TX 78712 USA
来源：
JOURNAL OF APPLIED PHYSICS | 2011年 / 109卷 / 07期
关键词：
D O I：
10.1063/1.3565190
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on the successful preparation and characterization of fluorescent magnetic core/shell Fe3O4/ZnSe nanoparticles (NPs) with a spherical shape by organometallic synthesis. The 7 nm core/3 nm shell NPs show good magnetic and photoluminescence (PL) responses. The observed PL emission/excitation spectra are shifted to shorter wavelengths, compared to a reference ZnSe NP sample. A dramatic reduction of PL quantum yield is also observed. The temperature dependence of the magnetization for the core/shell NPs shows the characteristic features of two coexisting and interacting magnetic (Fe3O4) and nonmagnetic (ZnSe) phases. Compared to a reference Fe3O4 NP sample, the room-temperature Neel relaxation time in core/shell NPs is three times longer. (C) 2011 American Institute of Physics. [doi:10.1063/1.3565190]
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