Issue 3, 2017

High coercivity stellated cobalt metal multipods through solvothermal reduction of cobalt hydroxide nanosheets

Abstract

Solvated 2D nanosheets of dodecylsulphate intercalated α-cobalt hydroxide in 1-butanol are solvothermally reduced to hexagonal close packed (hcp) Co metal multipods in the presence of oleylamine. 1-Butanol, being a reducing solvent, facilitates the formation of Co metal. In addition to being a reducing agent, oleylamine also acts as a base which converts the metastable α-cobalt hydroxide nanosheets into β-hydroxide sheets. These sheets yield face centered cubic (fcc) CoO spheres which eventually grow into hcp Co metal multipods. All the pods are single crystalline with growth direction being [001], making the multipods resemble stellated polyhedra with overgrown branches. The stellated Co metal multipods exhibit high coercivity (Hc), of 880 and 552 Oe at 2 K and 300 K respectively, due to shape anisotropy.

Graphical abstract: High coercivity stellated cobalt metal multipods through solvothermal reduction of cobalt hydroxide nanosheets

Supplementary files

Article information

Article type
Paper
Submitted
16 Okt. 2016
Accepted
14 Nov. 2016
First published
05 Janv. 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 1413-1417

High coercivity stellated cobalt metal multipods through solvothermal reduction of cobalt hydroxide nanosheets

C. Nethravathi, C. R. Rajamathi, S. Singh, M. Rajamathi and C. Felser, RSC Adv., 2017, 7, 1413 DOI: 10.1039/C6RA25309A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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