Dresden 2026 – scientific programme
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MM: Fachverband Metall- und Materialphysik
MM 19: Poster Session
MM 19.28: Poster
Tuesday, March 10, 2026, 18:00–20:00, P5
synchrotron XAFS Study of Fe3O4/Au core--shell nanoparticles for magnetic--plasmonic applications — •Mai EL-Masry1, Giuliana Aquilanti2, Messaoud Harfouche3, Neama Imam4, and Jan Ingo FLEGE4 — 1Thebes Higher Engineering Institute, Cairo, Egypt — 2Elettra Sincrotrone Trieste, Italy — 3SESAME Synchrotron, Aman, Jordan — 4Brandenburg University of Technology Cottbus-Senftenberg, Germany
Magneto-plasmonic nanostructures enable multifunctional biomedical applications, including imaging, sensing, and targeted diagnostics. We synthesized Fe3O4/Au core--shell nanoparticles via a seed-mediated method and characterized them using synchrotron X-ray Absorption Fine Structure (XAFS) at the Fe K and Au L3 edges. XAFS analysis provided element-specific information on oxidation state, coordination, and local structure, confirming core--shell integrity and strong interfacial coupling. XRD and high-resolution TEM verified a crystalline Fe3O4 core and FCC Au shell, while VSM measurements demonstrated superparamagnetic behavior with high saturation magnetization. EXAFS and XANES results revealed metallic Au and Fe--O coordination consistent with magnetite, confirming successful shell formation. These results establish the structure-property relationship in magnetic--plasmonic nanostructures and demonstrate the importance of SESAME synchrotron techniques for advancing nanomaterials for sensing, imaging, and biomedical technologies.
Keywords: Magnetic–plasmonic; Fe₃O₄/Au; XAFS