Advanced Functional Materials · 2009 · 150 citations · 37 references
Natural SciencesMaterials EngineeringMaterials ScienceMagnetic MaterialsMaterials ChemistryNanomaterialsFerromagnetic MaterialsFerromagnetismMagnetic NanomaterialsMagnetic Properties Of SolidsNanomaterials SynthesisNanowiresCoercivityCrystallinityMagnetic CoercivityMagnetic NanorodsNanomagnetismNanorodsParticle ShapePolyol Synthesis
Abstract 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: i) 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 to their small mean diameter and high crystallinity.
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Fabrication and Magnetic Properties of Arrays of Metallic Nanowires
Timothy M. Whitney, Peter C. Searson, J. S. Jiang et al. · Science · 1993 · 1.2K citations
Natural Sciences, Materials Engineering, Materials Science +17
C. N. R. Rao, Francis Leonard Deepak, Gautam Gundiah et al. · Progress in Solid State Chemistry · 2003 · 692 citations