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.

Synthesis of monodisperse CdS nanorods catalyzed by Au nanoparticles

“…Au nanoparticles were synthesized by the well-known two-phase method of Brust et al [29] or by heating HAuCl 4 in tetralin in the presence of oleylamine [30].…”

Seeded Growth of Highly Luminescent CdSe/CdS Nanoheterostructures with Rod and Tetrapod Morphologies

“…Seeded growth has been successfully implemented in synthesis of core-shell and dumbbell nanocrystals [10][11][12]. In this letter we demonstrate that both size and structure of the seeds can be used to design multicomponent nanostructures with complex shapes and peculiar optical properties.…”

Nanoparticle Functionalization and Its Potentials for Molecular Imaging

“…Bifunctional composite NPs can be obtained by epitaxial growth of iron oxide NPs (IONPs) on the Au seeds to get Au−Fe 3 O 4 NPs, by decomposing Fe(CO) 5 on AuNP surface followed by oxidation 18. Hachtel et al worked synthesized microwave assisted gold nanotriangles decorated with IONPs, providing both magnetic and plasmonic properties to the particle 19.…”