以聚乙烯吡咯烷酮为软模板组装钴纳米颗粒形成的链状结构。

Chain-like structure created by assembly of cobalt nanoparticles using PVP as soft template.

作者信息

Zhang YaHui, Liang Fang, Wang Ning, Guo Lin, He Lin, Chen Chinping, Zhang Qi, Zhong Qunpeng

机构信息

School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China.

出版信息

J Nanosci Nanotechnol. 2008 Apr;8(4):2057-61. doi: 10.1166/jnn.2008.053.

DOI:10.1166/jnn.2008.053

PMID:18572614

Abstract

Using a wet chemical method, we have synthesized chain-like structure with diameters of 200-250 nm and lengths of approximately 10 microm formed by assembly of small cobalt nanoparticles. The chain-like structures were realized via reaction of CoCl2 x 6H2O and N2H4 in the presence of PVP in an ethylene glycol solution. Magnetic measurements show a coercivity of about 122 Oe at 300 K. We also propose a possible mechanism for the formation of the chain-like structures.

摘要

我们采用湿化学方法，通过小钴纳米颗粒的组装合成了直径为200 - 250纳米、长度约为10微米的链状结构。链状结构是通过在乙二醇溶液中，在聚乙烯吡咯烷酮（PVP）存在的情况下，使六水合氯化钴（CoCl₂·6H₂O）与肼（N₂H₄）反应实现的。磁性测量表明，在300 K时矫顽力约为122奥斯特（Oe）。我们还提出了链状结构形成的一种可能机制。