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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页数：3

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