Altavilla C., Leone C., Sannino D., Sarno M., Ciambelli P.
University of Salerno, IT
Keywords: application, carbon nanotubes, nanoparticles
The possibility of preparing monodispersed transition metal-oxides nanoparticles covered by functionalized long chain organic molecules, in the sub size range of 20 nm, has recently open an entire field of research. In fact, inorganic core at the nanoscale provides unusual properties with respect to the corresponding bulk counterpart. Moreover, functionalization of the organic coating with different groups makes these systems building blocks for novel nanostructured materials. Today, ferrite nanoparticles find significant applications in high frequency devices, memories, heat transfer devices, drug delivery systems, medical diagnostics, cancer therapy, catalysis. We have synthesized different classes of monodispersed MFe2O4 (M=Fe, Co, Ni) nanoparticles by decomposition of metal-organic precursors in organic solvent and explored the reaction temperature effect on the nanoparticles average dimension. We obtained particle sizes in the range of 2-6 nm at different reaction temperature. Moreover, we succeeded in modifying the organic coating with different long chain organic molecules opportunely functionalized for specific application by simple organic exchange reactions or by using different stabilizer agents directly during the synthesis. We have tested some of these nanoparticles as patterned catalyst for CVD synthesis of carbon nanotubes on silicon wafer.
Journal: TechConnect Briefs
Volume: 1, Nanotechnology 2009: Fabrication, Particles, Characterization, MEMS, Electronics and Photonics
Published: May 3, 2009
Pages: 143 - 146
Industry sector: Advanced Materials & Manufacturing
Topic: Nanoparticle Synthesis & Applications
ISBN: 978-1-4398-1782-7