Kinetically Controlled Synthesis of Hexagonally Close-Packed Cobalt Nanorods with High Magnetic Coercivity

被引：132

作者：

Soumare, Yaghoub ^{[1
]}

Garcia, Cecile ^{[2
]}

Maurer, Thomas ^{[3
]}

Chaboussant, Gregory ^{[3
]}

Ott, Frederic ^{[3
]}

Fievet, Fernand ^{[1
]}

Piquemal, Jean-Yves ^{[1
]}

Viau, Guillaume ^{[2
]}

机构：

[1] Univ Paris 07, ITODYS, F-75205 Paris 13, France

[2] Univ Toulouse, INSA, LPCNO, F-31077 Toulouse, France

[3] Ctr Etud Saclay, CNRS, CEA Saclay, Lab Leon Brillouin,UMR 12, F-91191 Gif Sur Yvette, France

来源：

ADVANCED FUNCTIONAL MATERIALS | 2009年 / 19卷 / 12期

关键词：

METALLIC NANOWIRES; TEMPLATE SYNTHESIS; POLYOL PROCESS; ARRAYS; FE; CO; NANOPARTICLES; NICKEL; SUPERLATTICES; PARTICLES;

D O I：

10.1002/adfm.200800822

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

High-quality monodisperse metallic cobalt nanorods are obtained by the reduction of carboxylate salts of Co(II) in 1,2-butanediol using a rapid, simple, and solid-template-free procedure. In this polyol process, particle shape can be controlled via the growth rate, which depends on three parameters: 1) the nature of the cobalt carboxylate, ii) the temperature ramp, and iii) the basicity of the medium. Cobalt in the hexagonally close-packed phase favored the growth of anisotropic particles. Magnetic measurements of the cobalt nanorods indicate they are ferromagnetic at room temperature. They have a very high coercivity of 9.0 kOe at 140 K, much higher than that observed for wires prepared with solid templates. This can be attributed their small mean diameter and high crystallinity.

引用

页码：1971 / 1977

页数：7

共 44 条

[1] Preparation of mesoporous silica templated metal nanowire films on foamed nickel substrates [J].