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

Nethravathi C, Rajamathi CR, Singh S, Rajamathi M, Felser C (2017)

Publication Type: Journal article

Publication year: 2017

Journal

RSC Advances Royal Society of Chemistry

Book Volume: 7

Pages Range: 1413-1417

Journal Issue: 3

DOI: 10.1039/C6RA25309A

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.

Involved external institutions

St. Joseph's College Autonomous IN India (IN) Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE)

How to cite

APA:

Nethravathi, C., Rajamathi, C.R., Singh, S., Rajamathi, M., & Felser, C. (2017). High coercivity stellated cobalt metal multipods through solvothermal reduction of cobalt hydroxide nanosheets. RSC Advances, 7(3), 1413-1417. https://doi.org/10.1039/C6RA25309A

MLA:

Nethravathi, C., et al. "High coercivity stellated cobalt metal multipods through solvothermal reduction of cobalt hydroxide nanosheets." RSC Advances 7.3 (2017): 1413-1417.

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