Synthesis, growth mechanism and magnetic properties of SiO2-coated Co nanocapsules

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	Synthesis, growth mechanism and magnetic properties of SiO2-coated Co nanocapsules
	X. F. Zhang; X. L. Dong; H. Huang; B. Lv; X. G. Zhu; J. P. Lei; S. Ma; W. Liu; Z. D. Zhang
	2007
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	55 期号:11 页码:3727-3733
摘要	The growth mechanism and magnetic properties of SiO2-coated Co nanocapsules synthesized by the arc-discharge method were investigated. Most of the as-prepared products were nanocapsules with a core/shell structure consisting of a Co core and a SiO2 shell, while some of them displayed a rod-like configuration. The formation of the SiO2 nanorods was governed by an extended vapor-liquid-solid (VLS) mechanism and Co nanoparticles acted as a catalyst for the growth of the nanorods. The Co/SiO2 nanocapsules were annealed at 300, 400 and 500 degrees C, respectively, for 30 min in air, in order to observe their oxidation behavior. The crystalline grains of the Co/SiO2 nanocapsules clearly grew during annealing. After annealing at 500 degrees C, the ferrimagnetic Co3O4 phase appeared. The grain size effect, oxidation behavior and magnetic properties are discussed in detail for the nanocapsules. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	dalian univ technol, sch mat sci & engn, state key lab mat modificat, dalian 116024, peoples r china. chinese acad sci, inst met res, int ctr mat phys, natl lab mat sci, shenyang 110016, peoples r china.;dong, xl (reprint author), dalian univ technol, sch mat sci & engn, state key lab mat modificat, dalian 116024, peoples r china;dongxl@dlut.edu.cn
关键词	Co Nanocapsules Arc-discharge Vls Growth Mechanism Magnetic Properties Arc-discharge Nanoparticles Silica Nanowires Particles
URL	查看原文
WOS记录号	WOS:000247417700010
引用统计	被引频次：32[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/34049
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. F. Zhang,X. L. Dong,H. Huang,et al. Synthesis, growth mechanism and magnetic properties of SiO2-coated Co nanocapsules[J]. Acta Materialia,2007,55(11):3727-3733.
APA	X. F. Zhang.,X. L. Dong.,H. Huang.,B. Lv.,X. G. Zhu.,...&Z. D. Zhang.(2007).Synthesis, growth mechanism and magnetic properties of SiO2-coated Co nanocapsules.Acta Materialia,55(11),3727-3733.
MLA	X. F. Zhang,et al."Synthesis, growth mechanism and magnetic properties of SiO2-coated Co nanocapsules".Acta Materialia 55.11(2007):3727-3733.