Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 16: Poster I
MA 16.32: Poster
Dienstag, 12. März 2013, 10:30–13:30, Poster D
Formation of ferrite nanoparticles monitored during the preparation process by Mössbauer spectroscopy — •Mathias Kraken1, Nathalie Leise1, Andre Borchers1, Dirk Menzel1, Jochen Litterst1, Ingke-Christine Masthoff2, Ilka-Marina Grabs2, and Georg Garnweitner2 — 1Institut für Physik der kondensierten Materie, Technische Universität Braunschweig, 38106 Braunschweig, Germany — 2Institut für Partikeltechnik, Technische Universität Braunschweig, Braunschweig, Germany
In the recent years, a broad variety of different preparation methods for magnetic nanoparticles has been established. In this context, the non-aqueous sol-gel method is a rather new process, based on the bottom-up approach, which produces spherical nanoparticles with a small size distribution [1].
Mixtures of Fe(acac)3 with different solvents are placed in a reactor at temperatures above room temperature (typically 200∘C). The physical properties of the formed particles depend on the time spent in the reactor.
We investigated solutions of Fe(acac)3 with triethyleneglycol and benzyl alcohol for different reaction times in the reactor by dynamic light scattering, DC susceptibility and Mössbauer spectroscopy in order to gain more information about the process of the formation of the nanoparticles during the stay of the solution in the reactor.
[1] I.-M. Grabs et al., Cryst. Growth Des. 12, 1496 (2012).