Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices

Shouheng Sun, C. B. Murray, Dieter Weller, Liesl Folks, Andreas Moser

Research output: Contribution to journalArticlepeer-review

5826 Scopus citations

Abstract

Synthesis of monodisperse iron-platinum (FePt) nanoparticles by reduction of platinum acetylacetonate and decomposition of iron pentacarbonyl in the presence of oleic acid and oleyl amine stabilizers is reported. The FePt particle composition is readily controlled, and the size is tunable from 3- to 10-nanometer diameter with a standard deviation of less than 5%. These nanoparticles self-assemble into three-dimensional superlattices. Thermal annealing converts the internal particle structure from a chemically disordered face-centered cubic phase to the chemically ordered face-centered tetragonal phase and transforms the nanoparticle superlattices into ferromagnetic nanocrystal assemblies. These assemblies are chemically and mechanically robust and can support high-density magnetization reversal transitions.

Original languageEnglish (US)
Pages (from-to)1989-1992
Number of pages4
JournalScience
Volume287
Issue number5460
DOIs
StatePublished - Mar 17 2000
Externally publishedYes

ASJC Scopus subject areas

  • General

Fingerprint

Dive into the research topics of 'Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices'. Together they form a unique fingerprint.

Cite this