Solution synthesis of triangular and hexagonal nickel nanosheets with the aid of tungsten hexacarbonyl. Issue 8 (29th January 2016)

• Record Type: Journal Article
• Authors: Wang, Zhichao; Chen, Yuanzhi; Zeng, Deqian; Zhang, Qinfu; Peng, Dong-Liang
• Is Part Of: CrystEngComm. Volume 18:Issue 8(2016)
• Page Start: 1295
• Page End: 1301
• Publication Date: 2016-01-29
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c5ce02187a
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Tungsten hexacarbonyl can be used to induce the growth of shape-anisotropic Ni nanocrystals. Enhanced magnetic anisotropy is achieved for the prepared triangular and hexagonal Ni nanosheets. 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.