Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 19: Poster I
MA 19.12: Poster
Dienstag, 1. April 2014, 13:00–15:30, P1
Formation of ferrite nanoparticles monitored during the preparation process — •Mathias Kraken1, Ingke-Christine Masthoff2, Dennis Mauch1, Dirk Menzel1, Jochen Litterst1, and Georg Garnweitner2 — 1Institut für Physik d. kond. Materie, TU Braunschweig — 2Institut für Partikeltechnik, TU Braunschweig
In the recent years, a broad variety of different preparation methods for magnetic nanoparticles has been established. In this context, the nonaqueous 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 e.g. benzyl alcohol are placed in a reactor at temperatures above room temperature (typically 200∘C) for several hours. The physical properties of the formed particles strongly depend on the time spent in the reactor.
By examining extracted sample material for different waiting times in the reactor, we were able to follow the formation and the subsequent growth of the ferrite nanoparticles, using Mössbauer spectroscopy, DC-susceptibility and TEM [2,3].
[1] I.-M. Grabs et al., Cryst. Growth Des. 12, 1496 (2012).
[2] M. Kraken et al., Hyp. Int, published online, (2013).
[3] I.-C. Masthoff et al., in preparation.