Trapping Iron Oxide into Hollow Gold NanoparticlesAuthor(s): Huang Chienwen | Jiang Jiechao | Muangphat Chivarat | Sun Xiankai | Hao Yaowu
Journal: Nanoscale Research Letters ISSN 1931-7573
Volume: 6; Issue: 1; Start page: 43; Date: 2011;
Keywords: Gold nanoparticles | Iron oxide nanoparticles | Core/shell nanoparticles | Hollow nanoparticles | Porous nanoparticles | Plasmonics
Abstract Synthesis of the core/shell-structured Fe3O4/Au nanoparticles by trapping Fe3O4 inside hollow Au nanoparticles is described. The produced composite nanoparticles are strongly magnetic with their surface plasmon resonance peaks in the near infrared region (wavelength from 700 to 800 nm), combining desirable magnetic and plasmonic properties into one nanoparticle. They are particularly suitable for in vivo diagnostic and therapeutic applications. The intact Au surface provides convenient anchorage sites for attachment of targeting molecules, and the particles can be activated by both near infrared lights and magnetic fields. As more and more hollow nanoparticles become available, this synthetic method would find general applications in the fabrication of core–shell multifunctional nanostructures.