Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 51: Magnetism Poster B

MA 51.16: Poster

Donnerstag, 4. April 2019, 15:00–18:00, Poster C

Wet-chemically prepared magnetic nanoparticles: Influence of different preparation methods — •Jan Martin Henke, Maryam Youhannayee, and Mathias Getzlaff — Institut für Angewandte Physik, Heinrich-Heine-Universität, Düsseldorf, Deutschland

Iron oxide nanoparticles (NP) are often used in hyperthermia for cancer therapy due to their unique magnetic properties in order to heat up the tumor cells. In this project magnetite nanoparticles are synthesized in coprecipitation method under different variable parameters such as iron salt, stirring speed and temperature. After synthesizing the particles, they are coated by 3-aminopropyltriethoxysilane (APTES) and tetramethylammoniumhydroxide (TMAOH).

The morphology and crystalline structure of the particles are characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD), resp. The average size measured by TEM is about (10.40 ± 2.88) nm. The crystalline structure of magnetite was confirmed by XRD.

The properties of particles prepared by different salts do not show significant changes in size and crystalline structure. The XRD-data were fitted with Gaussian and Voigt functions. The size was calculated with the Scherrer equation and confirm approximately the same diameter as measured by TEM. A reduced stirring speed did also not affect the particles diameter, but an increased temperature leads to smaller particles. The stability of the particles in aqueous solution was increased by APTES and TMAOH coating.