Synthesis and characterization of cobalt/gold bimetallic nanoparticles
Synthesis and characterization of cobalt/gold bimetallic nanoparticles
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DOI：
10.1016/j.jmmm.2006.11.164
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发表时间：
2007-04-01
影响因子：
2.7
通讯作者：
Walker, Angela R. Hight
中科院分区：
文献类型：
--
作者：
Cheng, Guangjun;Walker, Angela R. Hight
在预先合成的Co纳米颗粒存在的情况下，将氯化金（III）化学还原为金，制备了钴/金（Co/Au）双金属纳米颗粒。利用透射电子显微镜（TEM）、紫外-可见（UV-vis）吸收光谱法和超导量子干涉装置（SQUID）磁强计对制备的双金属纳米颗粒进行了表征。我们的研究结果表明，An不仅生长在Co纳米颗粒上，形成表面涂层，而且还扩散到Co纳米颗粒中。An的引入改变了Co纳米粒子的晶体结构，改变了它们的磁性能。十二硫醇诱导制备的Co/Au双金属纳米颗粒的重组。(C) 2006 Elsevier B.V.版权所有
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.