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Surface engineering of Co and FeCo nanoparticles for biomedical application

2006; IOP Publishing; Volume: 18; Issue: 38 Linguagem: Inglês

10.1088/0953-8984/18/38/s02

1361-648X

Silke Behrens, Helmut Bönnemann, Nina Matoussevitch, A. Gorschinski, Eckhard Dinjus, W. Habicht, Jens Bolle, Svetlana Zinoveva, Natalie Palina, J. Hormes, Hartwig Modrow, Stephan Bahr, V. Kempter,

Gold and Silver Nanoparticles Synthesis and Applications

Monodisperse Co, Fe, and FeCo nanoparticles are prepared via thermal decomposition of metal carbonyls in the presence of aluminium alkyls, yielding air-stable magnetic metal nanoparticles after surface passivation. The particles are characterized by electron microscopy (SEM, TEM, ESI), electron spectroscopy (MIES, UPS, and XPS) and x-ray absorption spectroscopy (EXAFS). The particles are peptized by surfactants to form stable magnetic fluids in various organic media and water, exhibiting a high volume concentration and a high saturation magnetization. In view of potential biomedical applications of the particles, several procedures for surface modification are presented, including peptization by functional organic molecules, silanization, and in situ polymerization.