Synthesis and Characterization of Magnetic FePt/Au Core/Shell Nanoparticles
| Autor: | Hamed Arami, Shishou Kang, Girija S. Chaubey, John Griffis, J. Ping Liu, Vikas Nandwana, Kazuaki Yano, Narayan Poudyal |
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| Rok vydání: | 2009 |
| Předmět: |
Water dispersible
Materials science Annealing (metallurgy) Nanoparticle Nanotechnology Core shell nanoparticles Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Ferromagnetism Chemical solution Surface modification Physical and Theoretical Chemistry Superparamagnetism |
| Zdroj: | The Journal of Physical Chemistry C. 113:13088-13091 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp901985u |
| Popis: | We report a two-step chemical solution process for synthesis of FePt/Au core/shell nanoparticles. First, FePt nanoparticles were synthesized using a typical polyol process. The as-synthesized FePt nanoparticles were then used as seed materials and were coated with gold shells by reduction of the gold precursors. The coated nanoparticles have been characterized using various structural and morphological measurements to confirm the FePt/Au core/shell morphology. The as-synthesized FePt/Au nanoparticles were found to be superparamagnetic and became ferromagnetic after annealing at 400 °C. The surface modification of FePt/Au core/shell nanoparticles from hydrophobic to hydrophilic was achieved through ligand exchange to make them water dispersible for potential biomedical applications. |
| Databáze: | OpenAIRE |
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