High-yield solvothermal synthesis of magnetic chains self-assembled by hexagonal cobalt microflakes
- 作者：Meiying Liu ; myliu312@yahoo.com ; Linlin Chen ; Chunming Lin ; Nannan Shan ; Xiaoqian Li ; Bona Li
- 关键词：Chain ; Co ; Microflake ; Solvothermal ; Magnetic materials ; Nanocrystalline materials
- 刊名：Materials Letters
- 出版年：2012
- 期刊代码：59_0167577x
- 类别：ms
- 出版时间：1 May, 2012
- 卷：74
- 期：Complete
- 页码：167-169
- 文件大小：549 K
摘要
Novel magnetic Co chains with lengths of up to 10-100 渭m, self-assembled by cross-linked hexagonal Co microflakes with an average diameter of 2-10 渭m and a thickness of about 130 nm, have been solvothermally prepared in the mixed solution of ethylene glycol and ethylenediamine with polyvinyl pyrrolidone (PVP) and dodecanethiol as surfactant. The products were characterized by XRD, EDS, SEM, TEM, HRTEM and SQUID methods. The Co microchains exhibit a ferromagnetic characteristic with the coercivity of 148.8 Oe at room temperature, over fourteen orders of magnitude larger than that of bulk Co counterpart. The simple and high yield synthetic technique can be applied to the fabrication of other metals with complex hierarchical structures.