Magnetic assembly and pyrolysis of functional ferromagnetic colloids into one-dimensional carbon nanostructures

Steven E. Bowles, Wei Wu, Tomasz Kowalewski, Matthew C. Schalnat, Robert J. Davis, Jeanne E. Pemberton, Inbo Shim, Bryan D. Korth, Jeffrey Pyun

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

A novel synthetic route to functionalize and magnetically assemble ferromagnetic colloids into one-dimensional (1-D) carbon nanostructures is reported. The synthesis of ferromagnetic cobalt nanoparticles with polyacrylonitrile (PAN) shells was achieved by ligand exchange of PAN onto preformed polystyrene-coated ferromagnetic cobalt nanoparticles. PAN-coated ferromagnetic nanoparticles (PAN-CoNPs) were then cast onto supporting surfaces from N,N-dimethylformamide (DMF) in the presence of an external magnetic field and pyrolyzed to form 1-D carbon nanoparticle chains spanning microns in length. Atomic force microscopy, field emission scanning electron microscopy, Raman spectroscopy, vibrating sample magnetometry, and X-ray diffraction were used to confirm the preparation of these 1-D hybrid nanostructures. This versatile methodology provides an alternative approach to prepare 1-D carbon materials using soluble precursors that can be magnetically directed and organized.

Original languageEnglish (US)
Pages (from-to)8694-8695
Number of pages2
JournalJournal of the American Chemical Society
Volume129
Issue number28
DOIs
StatePublished - Jul 18 2007

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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