Cobalt–silica magnetic nanoparticles with functional surfaces

Cobalt–silica magnetic nanoparticles with functional surfaces

Cobalt nanoparticles encased in polysiloxane block copolymers have been heated at 600–700 °C to form protective shells around the particles, which contain crosslinked Si–O structures, and to anneal the cobalt. Methods to functionalize and modify the surfaces of the pyrolyzed/annealed silica–cobalt c...

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Veröffentlicht in:Journal of magnetism and magnetic materials 2005-05, Vol.293 (1), p.162-170
Hauptverfasser: Vadala, Michael L., Zalich, Michael A., Fulks, David B., St. Pierre, Tim G., Dailey, James P., Riffle, Judy S.
Format: Artikel
Sprache:eng
Schlagworte:
Cobalt
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Functionalization
Magnetic properties and materials
Nanoparticles
Physics
Poly(lactic acid) (PLA)
Polydimethylsiloxane (PDMS)
Polyethylene glycole (PEG)
Polysiloxane
Small particles and nanoscale materials
Studies of specific magnetic materials
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Zusammenfassung:Cobalt nanoparticles encased in polysiloxane block copolymers have been heated at 600–700 °C to form protective shells around the particles, which contain crosslinked Si–O structures, and to anneal the cobalt. Methods to functionalize and modify the surfaces of the pyrolyzed/annealed silica–cobalt complexes with amines, isocyanates, poly(ethylene oxide), poly( l-lactide) and polydimethylsiloxane (PDMS) are presented.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2005.01.056