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In this work, the role of the nanoscale chemical and magnetic structure on relaxation dynamics of iron oxide nanoparticles in the context of magnetic particle imaging (MPI) is investigated with Mössbauer spectroscopy (MS) and electron energy loss spectroscopy (EELS). Two samples of 27 nm monodisperse iron oxide nanoparticles are compared, with and without an additional oxidation optimization step,...
MPI signal intensity and spatial resolution are highly dependent on the median core size and size monodispersity of the tracers[1]. Increasing the core size of the highly monodisperse tracers to about 25–27nm (i.e close to the superparamagnetic to ferromagnetic transition at room temperature and 100s measurement time, assuming bulk anisotropy) significantly improves the MPI spatial resolution and...
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