Wet-chemistry synthesis of nickel-bismuth bimetallic nanoparticles and nanowires

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

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

The simultaneous decomposition of bis(cyclooctadiene)nickel (0) [Ni(COD) 2] and tetraphenyldibismuthine [Bi 2Ph 4] 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.

Original languageEnglish
Pages (from-to)4750-4754
Number of pages5
JournalChemistry of Materials
Volume17
Issue number18
DOIs
Publication statusPublished - Sep 6 2005

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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