Wet-Chemistry Synthesis of Nickel−Bismuth Bimetallic Nanoparticles and Nanowires

Ould-Ely, Teyeb; Thurston, John H.; Kumar, Arvind; Respaud, Marc; Guo, Wenhua; Weidenthaler, Claudia; Whitmire, Kenton H.

doi:10.1021/cm049678u

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Wet-Chemistry Synthesis of Nickel−Bismuth Bimetallic Nanoparticles and Nanowires

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Weidenthaler, Claudia
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Ould-Ely, T., Thurston, J. H., Kumar, A., Respaud, M., Guo, W., Weidenthaler, C., et al. (2005). Wet-Chemistry Synthesis of Nickel−Bismuth Bimetallic Nanoparticles and Nanowires. Chemistry of Materials, 17(18), 4750-4754. doi:10.1021/cm049678u.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-95E1-0

Abstract

The simultaneous decomposition of bis(cyclooctadiene)nickel (0) [Ni(COD)₂] and tetraphenyldibismuthine [Bi₂Ph₄] in tetrahydrofuran (THF) at reflux temperature leads to nickel−bismuth alloy nanoparticles with an average size of 8−10 nm. Transmission electron microscopy (TEM) diffraction methods show that these nanoparticles adopt the hexagonal structure of β-NiBi. Magnetic characterization shows a superparamagnetic behavior at temperatures above 45 K and the presence of antiferromagnetic dipolar interactions between the particles. XRD confirms the crystallization of the β-NiBi at temperatures above 600 °C. When the decomposition is carried out at a higher temperature (200 °C) in the presence of trioctylamine and oleic acid, NiBi nanowires were observed in addition to the nanoparticles.