Journal
RSC ADVANCES
Volume 7, Issue 3, Pages 1413-1417Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra25309a
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- DST, India [EMR/2015/001982]
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Solvated 2D nanosheets of dodecylsulphate intercalated alpha-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 alpha-cobalt hydroxide nanosheets into beta-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 (H-c), of 880 and 552 Oe at 2 K and 300 K respectively, due to shape anisotropy.
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