Structure and Properties of Magnetic (Co, Fe, Fe{sub 3}C and Ni) Carbon Beads

Journal Article · Thu Dec 02 00:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3530017· OSTI ID:21506932

Leonowicz, Marcin; Izydorzak, Marta ^[1]; Pomogailo, Anatolii D; Dzhardimalieva, Gulzhian I ^[2]

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1. Faculty of Materials Science and Engineering, Warsaw University of Technology, Woloska 141, 02-507 Warsaw (Poland)
2. Institute of Chemical Physics RAS, Chernogolovka (Russian Federation)

Nanoparticles exhibit unique physical properties due to the surface or quantum-size effects. Particular attention has been focused on magnetic nanoparticles and substantial progress has been done in this field. In this work magnetic composites, consisting of elementary metals or carbides nanocrystallites, stabilized in carbon matrix, were prepared by the procedure comprising formation of appropriate metal acrylamide complexes, followed by frontal polymerization and pyrolysis of the polymer at various temperatures. Application of frontal polymerization and further pyrolysis enables formation of composite beads consisting of Co, Fe, Fe{sub 3}C or Ni nanocrystallites stabilized in carbon matrix. It was found that the lowest pyrolysis temperature, which enables the production of metallic nanocrystallites, was 673 K for Co and Ni, and 773 K for Fe. The magnetic properties of the beads, percentage of the metallic component, their composition and shape depended on the pyrolysis temperature. Extracts on the basis of composites containing Fe{sub 3}C showed no cytotoxicity, whereas those containing Co and Ni exhibited negligible cytotoxicity up to concentrations of 6.25 mg/ml.

• OSTI ID: 21506932
• Journal Information: AIP Conference Proceedings, Vol. 1311, Issue 1; Conference: 8. international conference on the scientific and clinical applications of magnetic carriers, Rostock (Germany), 25-29 May 2010; Other Information: DOI: 10.1063/1.3530017; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ACRYLAMIDE
CARBON
COBALT
IRON
IRON CARBIDES
MAGNETIC PROPERTIES
MAGNETIZATION
MATRIX MATERIALS
METALS
NANOSTRUCTURES
NICKEL
PARTICLES
POLYMERIZATION
POLYMERS
PYROLYSIS
SCANNING ELECTRON MICROSCOPY
SURFACES
TEMPERATURE RANGE 0400-1000 K
TOXICITY
X-RAY DIFFRACTION
AMIDES
CARBIDES
CARBON COMPOUNDS
CHEMICAL REACTIONS
COHERENT SCATTERING
DECOMPOSITION
DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
IRON COMPOUNDS
MATERIALS
MICROSCOPY
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHYSICAL PROPERTIES
SCATTERING
TEMPERATURE RANGE
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS