title: Synthesis and properties of Au-Fe3O4 heterostructured nanoparticles.
abstract: Au-Fe(3)O(4) composite nanoparticles have received much research interest due to their promising biomedical applications. In this work, Au-Fe(3)O(4) composites with well-defined dimer-like nanostructure were synthesized via thermal decomposition route. The surfactant 1,2-hexandicandiol has proved to be critical for the formation of the Au-Fe(3)O(4) hetero-dimers. The hetero-dimers production yield could be significantly improved to be 90% when the 1,2-hexandicandiol concentration was optimized at 0.6 M. The obtained Au-Fe(3)O(4) hetero-dimers possess dual-functionalities of plasmon resonance and magnetization. Moreover, the Fe(3)O(4) domain of the hetero-dimers can be tuned readily by adjusting the molar ratio between Fe and Au sources. Furthermore, it was demonstrated that these Au-Fe(3)O(4) hetero-dimers could be further developed into star-like Au-Fe(3)O(4) nanoparticles which showed plasmon absorption at NIR region.
authors.affiliation: Department of Materials Science and Engineering, Faculty of Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574, Singapore.
authors.forename: Yang
authors.initials: Y
authors.lastname: Sheng
authors.forename: Junmin
authors.initials: J
authors.lastname: Xue
mesh_terms: D001672:Biocompatible Materials / Q000138:chemical synthesis*; D019281:Dimerization; D005233:Fatty Alcohols / Q000737:chemistry; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D008280:Magnetics; D008422:Materials Testing; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D020349:Surface Plasmon Resonance; D013501:Surface-Active Agents / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D001672:Biocompatible Materials; D005233:Fatty Alcohols; D013501:Surface-Active Agents; C470411:1,2-hexadecanediol; D006046:Gold; D052203:Ferrosoferric Oxide