The synthesis of core-shell iron@gold nanoparticles and their characterization

被引：158

作者：

Ban, ZH ^{[1
]}

Barnakov, YA ^{[1
]}

Golub, VO ^{[1
]}

O'Connor, CJ ^{[1
]}

机构：

[1] Univ New Orleans, Adv Mat Res Inst, New Orleans, LA 70148 USA

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2005年 / 15卷 / 43期

关键词：

D O I：

10.1039/b504304b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Au-coated magnetic Fe nanoparticles have been successfully synthesized by partial replacement reaction in a polar aprotic solvent with about I I rim core of Fe and about 2.5 nm shell of An. In this work, a combination of TEM (transmission electron microscopy), XRD (X-ray powder diffractometry), EDS (energy disperse X-ray spectroscopy), SQUID (superconducting quantum interference device), TGA (thermograviometric analysis) and UV-visible absorption spectroscopy were employed to characterize the morphology, structure, composition and magnetic properties of the products. HRTEM images show clear core-shell structure with different crystal lattices from Fe and An. SQUID magnetometry reveals that particle magnetic properties are not significantly affected by the overlayer of a moderately thick An shell. The Au-coated particles exhibit a surface plasmon resonance peak that red-shifts from 520 to 680 nm. And all the above characterizations show that in this sample there are no iron oxides inside the particle.

引用

页码：4660 / 4662

页数：3

共 19 条

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