Synthesis and characterization of cobalt/gold bimetallic nanoparticles

被引：47

作者：

Cheng, Guangjun ^{[1
]}

Walker, Angela R. Hight ^{[1
]}

机构：

[1] Natl Inst Stand & Technol, Opt Technol Div, Phys Lab, Gaithersburg, MD 20899 USA

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 311卷 / 01期

关键词：

cobalt nanoparticles; magnetic nanoparticles; cobalt/gold; bimetallic nanoparticle; magnetic properties;

D O I：

10.1016/j.jmmm.2006.11.164

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cobalt/gold (Co/Au) bimetallic nanoparticles are prepared by chemically reducing gold (III) chloride to gold in the presence of pre-synthesized Co nanoparticles. Transmission electron microscopy (TEM), ultraviolet-visible (UV-vis) absorption spectrometry, and a superconducting quantum interference device (SQUID) magnetometer have been used to characterize as-prepared bimetallic nanoparticles. Our findings demonstrate An not only grows onto Co nanoparticles, forming a surface coating, but also diffuses into Co nanoparticles. The introduction of An alters the crystalline structure of Co nanoparticles and changes their magnetic properties. Dodecanethiols induce a reorganization of as-prepared Co/Au bimetallic nanoparticles. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：31 / 35

页数：5

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