Magnetic-Plasmonic Core-Shell Nanoparticles

被引：322

作者：

Levin, Carly S. ^{[1
]}

Hofmann, Cristina ^{[1
]}

Ali, Tamer A. ^{[3
]}

Kelly, Anna T. ^{[1
]}

Morosan, Emilia ^{[2
]}

Nordlander, Peter ^{[2
,3
]}

Whitmire, Kenton H. ^{[1
]}

Halas, Naomi J. ^{[1
,3
]}

机构：

[1] Rice Univ, Dept Chem, Houston, TX 77251 USA

[2] Rice Univ, Dept Phys & Astron, Houston, TX 77251 USA

[3] Rice Univ, Dept Elect & Comp Engn, Houston, TX 77251 USA

来源：

ACS NANO | 2009年 / 3卷 / 06期

基金：

美国国家科学基金会;

关键词：

wustite nanocrystals; core-shell nanostructure; surface plasmon resonance; bifunctional; magnetic nanoshells; COATED IRON NANOPARTICLES; OPTICAL-PROPERTIES; MONODISPERSE NANOCRYSTALS; METALLIC NANOSHELLS; WUSTITE; NANOSTRUCTURES; OXIDES; HYBRIDIZATION; TEMPERATURE; PROBES;

D O I：

10.1021/nn900118a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Nanoparticles composed of magnetic cores with continuous Au shell layers simultaneously possess both magnetic and plasmonic properties. Faceted and tetracubic nanocrystals consisting of wustite with magnetite-rich corners and edges retain magnetic properties when coated with a Au shell layer, with the composite nanostructures showing ferrimagnetic behavior. The plasmonic properties are profoundly influenced by the high dielectric constant of the mixed iron oxide nanocrystalline core. A comprehensive theoretical analysis that examines the geometric plasmon tunability over a range of core permittivities enables us to identify the dielectric properties of the mixed oxide magnetic core directly from the plasmonic behavior of the core-shell nanoparticle.

引用

页码：1379 / 1388

页数：10

共 57 条

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