Magnetic properties of dendrimer-encapsulated iron nanoparticles containing an average of 55 and 147 atoms

Marc Knecht, Richard M. Crooks

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

The synthesis, characterization and magnetic properties of Fe nanoparticles containing an average of 55 and 147 atoms are described. The nanoparticles are prepared using dendrimer templates, and therefore they are nearly size-monodisperse. In the absence of oxygen and water, the Fe nanoparticles are stable, but they decompose quickly when exposed to air. Magnetic analysis indicates that the 55-atom nanoparticles are superparamagnetic, but the 147-atom materials undergo a transition to ferromagnetic at 6 K. Both materials exhibit suppression of the magnetic saturation compared to bulk Fe.

Original languageEnglish
Pages (from-to)1349-1353
Number of pages5
JournalNew Journal of Chemistry
Volume31
Issue number7
DOIs
StatePublished - Jul 12 2007
Externally publishedYes

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Dendrimers
Magnetic properties
Iron
Nanoparticles
Atoms
Saturation magnetization
Oxygen
Water
Air

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Magnetic properties of dendrimer-encapsulated iron nanoparticles containing an average of 55 and 147 atoms. / Knecht, Marc; Crooks, Richard M.

In: New Journal of Chemistry, Vol. 31, No. 7, 12.07.2007, p. 1349-1353.

Research output: Contribution to journalArticle

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