Magnetic Chains Created by Polymer-Induced Assembly of Hollow Cobalt Nanoparticles

Lin Guo; Fang Liang; Chen Min Liu; Hui Bin Xu; Qun Peng Zhong; Xiaogang Wen; Shihe Yang; Wangzhi Zheng; Chinping Chen

Magnetic Chains Created by Polymer-Induced Assembly of Hollow Cobalt Nanoparticles

Materials Science 2007-05-23 v1

Authors: Lin Guo , Fang Liang , Chen Min Liu , Hui Bin Xu , Qun Peng Zhong , Xiaogang Wen , Shihe Yang , Wangzhi Zheng , Chinping Chen

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Abstract

Magnetic chains of hollow cobalt nanoparticles (450-750 nm) have been synthesized by using poly(vinyl pyrrolidone) (PVP) as a template in an ethylene glycol solution. In this process, CoCl2.6H2O was reduced by N2H4.H2O in the presence of PVP. All of the Co nanoparticles are hollow with a shell of 40 nm and self-assembled into a chainlike structure that is as long as ~10 micron. At 300 K, the branched hollow Co nanoparticle chains exhibit a saturation magnetization of 37.5 emu/g, a remnant magnetization of approximately 1.55 emu/g, and a coercivity of about 66 Oe, which is more than an order of magnitude larger than that of the bulk

Keywords

cobalt nanoparticles magnetic chains polymer templating hollow structure superparamagnetism

Cite

@article{arxiv.cond-mat/0509237,
  title  = {Magnetic Chains Created by Polymer-Induced Assembly of Hollow Cobalt Nanoparticles},
  author = {Lin Guo and Fang Liang and Chen Min Liu and Hui Bin Xu and Qun Peng Zhong and Xiaogang Wen and Shihe Yang and Wangzhi Zheng and Chinping Chen},
  journal= {arXiv preprint arXiv:cond-mat/0509237},
  year   = {2007}
}

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14 pages, 6 figures

Magnetic Chains Created by Polymer-Induced Assembly of Hollow Cobalt Nanoparticles

Abstract

Keywords

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