title: Dumbbell-like bifunctional Au-Fe3O4 nanoparticles.
abstract: Dumbbell-like Au-Fe(3)O(4) nanoparticles are synthesized using decomposition of Fe(CO)(5) on the surface of the Au nanoparticles followed by oxidation in 1-octadecene solvent. The size of the particles is tuned from 2 to 8 nm for Au and 4 nm to 20 nm for Fe(3)O(4). The particles show the characteristic surface plasmon absorption of Au and the magnetic properties of Fe(3)O(4) that are affected by the interactions between Au and Fe(3)O(4). The dumbbell is formed through epitaxial growth of iron oxide on the Au seeds, and the growth can be affected by the polarity of the solvent, as the use of diphenyl ether results in flower-like Au-Fe(3)O(4) nanoparticles.
authors.affiliation: IBM T. J. Watson Research Center, Yorktown Heights, NY 10598, USA.
authors.forename: Heng
authors.initials: H
authors.lastname: Yu
authors.forename: Min
authors.initials: M
authors.lastname: Chen
authors.forename: Philip M
authors.initials: PM
authors.lastname: Rice
authors.forename: Shan X
authors.initials: SX
authors.lastname: Wang
authors.forename: R L
authors.initials: RL
authors.lastname: White
authors.forename: Shouheng
authors.initials: S
authors.lastname: Sun
mesh_terms: D000327:Adsorption; D003460:Crystallization / Q000379:methods*; D005290:Ferric Compounds / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D008280:Magnetics; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000032:analysis* / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size
chemical_list: D005290:Ferric Compounds; C000499:ferric oxide; D006046:Gold