Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 92: Nanostructures at surfaces: Dots, particles, clusters I
O 92.5: Vortrag
Donnerstag, 15. März 2018, 11:45–12:00, MA 141
Investigation of core-shell nanoparticles using scanning transmission x-ray microscopy (STXM) — •Anja Hermanns1, Sufal Swaraj2, Thomas Heinrich1, Caterina Minelli3, Katia Sparnacci4, and Wolfgang Unger1 — 1Bundesanstalt für Materialforschung und -prüfung, 12203 Berlin, Germany — 2Synchrotron SOLEIL, 91190 Saint-Aubin, France — 3National Physical Laboratory, Teddington TW11 0LW, United Kingdom — 4Università del Piemonte Orientale, 15121 Alessandria, Italy
Products containing nanoparticles encounter us in almost all areas of our daily life. In most cases the particles exhibit a core-shell morphology either voluntarily or involuntarily. The properties of the shell determine the interaction of the particles with their environment and, thus, reliable control over these properties means reliable control over the performance of the particles. Beside its chemical composition, the thickness of the shell is a parameter of utmost importance. A scanning transmission x-ray microscopy (STXM) based methodology is presented for determining the dimensions (shell thickness, core and total diameter) of core-shell nanoparticles which exhibit a strong x-ray absorption contrast and a well-defined interface between core and shell material. The authors acknowledge support from the European Metrology Programme for Innovation and Research (EMPIR) as part of the InNanoPart 14IND12 project. The EMPIR initiative is co-funded by the European Unions Horizon 2020 research and innovation programme and by the EMPIR participating states.