Magnetite Nanoparticles Anchored to Crystalline Silicon Surfaces (Articolo in rivista)

Type
Label
  • Magnetite Nanoparticles Anchored to Crystalline Silicon Surfaces (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1021/cm050231a (literal)
Alternative label
  • Cattaruzza F.; Fiorani D.; Flamini A.; Imperatori P.; Scavia G.; Suber L.; Testa A.M.; Mezzi A.; Ausanio G.; Plunkett R.W. (2005)
    Magnetite Nanoparticles Anchored to Crystalline Silicon Surfaces
    in Chemistry of materials; ACS, American chemical society, Washington, DC (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Cattaruzza F.; Fiorani D.; Flamini A.; Imperatori P.; Scavia G.; Suber L.; Testa A.M.; Mezzi A.; Ausanio G.; Plunkett R.W. (literal)
Pagina inizio
  • 3311 (literal)
Pagina fine
  • 3316 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 17 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 12 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • ISM - CNR SPIN-CNR sede di Napoli (literal)
Titolo
  • Magnetite Nanoparticles Anchored to Crystalline Silicon Surfaces (literal)
Abstract
  • Magnetite nanoparticles of 5 nm mean diameter, coated with 10-undecynoic acid, have been anchored to crystalline Si(100) surfaces via the hydrosilylation reaction at 180 °C. The iron content in the sample (0.54 ± 0.05 ¼g/cm2) has been determined by atomic absorption analysis. The sample has been further characterized by X-ray photoelectron spectroscopy, field emission scanning, scanning-tunneling, and atomic force (AFM) microscopies. The thermal anchoring does not alter the morphology of the nanoparticles, causing only a slight oxidation of their surfaces. However, a second layer of nanoparticles was also formed, covering about 50% of the surface. The magnetic properties were studied using a SQUID magnetometer. ZFC (zero-field cooled) and FC (field cooled) curves were obtained in the 5-300 K temperature range. The ZFC curve shows a rounded maximum at Tmax ~20 K. A hysteretic magnetization cycle was also observed at 5 K with associated magnetization saturation and coercitivity values of 40 emu/g and 160 Oe, respectively. The magnetic behavior of the sample was found to be typical of an assembly of noninteracting (or very weakly interacting) super-paramagnetic particles. (literal)
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