From Micro to Nano Magnetic Spheres: Size-Controllable Synthesis, Multilayer Coatings, and Biomedical Applications

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Magnetic material has become a particular important research area and is attracting a great deal of attentions because of their potential technological applications, such as in ferrofluids, colored pigments, high-density magnetic recording media, chemical sensors, electrophotographic developers, biological assays and magnetic resonance imaging (MRI). In our group, size-controllable monodispersed ferrite nano to microspheres have been synthesized with a range of sizes from 20 nm to 300 nm. Some of these spheres have been coated efficiently with silica, carbon, gold, poly(aniline), dendrimers, etc. to yield well-defined core-shell structures. These magnetic microspheres were functionalized successfully with organic moieties such as crown ethers, acting as a tool for the preparation and magnetic separation of monofunctional gold nanoparticles. Moreover, ultrasmall magnetic nanospheres have been employed as both in vitro and in vivo MRI contrast agents.

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Journal: TechConnect Briefs
Volume: 1, Nanotechnology 2010: Advanced Materials, CNTs, Particles, Films and Composites
Published: June 21, 2010
Pages: 547 - 550
Industry sector: Advanced Materials & Manufacturing
Topics: Nanoparticle Synthesis & Applications
ISBN: 978-1-4398-3401-5