Issue 8, 2016

Solution synthesis of triangular and hexagonal nickel nanosheets with the aid of tungsten hexacarbonyl

Abstract

The preparation of magnetic metal nanocrystals with strong shape-anisotropy has attracted great research interest in recent years due to their unique applications in fields such as magnetic materials and catalysis. This paper explores a non-aqueous one-pot route to synthesizing triangular and hexagonal Ni nanosheets with an average edge length that can be reduced to 15 nm. In the synthesis, a widely used Ni precursor, nickel(II)acetylacetonate, is reduced by oleylamine in the presence of tungsten hexacarbonyl. An important aspect of such a synthetic strategy is that the nucleation temperature of the Ni nanocrystals can be as low as 150 °C. In the meantime, a shape-anisotropic nanostructure can be achieved. By increasing the reaction temperature and aging time, nanosheets with larger sizes are obtained. A possible formation mechanism is proposed for the as-prepared Ni nanosheets. Magnetic measurements show that all the prepared Ni nanosheets exhibit ferromagnetic characteristics at room temperature and larger magnetic anisotropy compared to spherical nanoparticles is evident.

Graphical abstract: Solution synthesis of triangular and hexagonal nickel nanosheets with the aid of tungsten hexacarbonyl

Supplementary files

Article information

Article type
Paper
Submitted
09 Nov 2015
Accepted
13 Jan 2016
First published
14 Jan 2016

CrystEngComm, 2016,18, 1295-1301

Solution synthesis of triangular and hexagonal nickel nanosheets with the aid of tungsten hexacarbonyl

Z. Wang, Y. Chen, D. Zeng, Q. Zhang and D. Peng, CrystEngComm, 2016, 18, 1295 DOI: 10.1039/C5CE02187A

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