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MM: Fachverband Metall- und Materialphysik

MM 65: Topical session: X-ray and neutron scattering in materials science VI - Which orientations can we expect for elongated particles in self-confined systems?

MM 65.3: Vortrag

Freitag, 4. April 2014, 12:30–12:45, BAR 205

Stabilization of ZnO nanoparticles - a SAXS/SANS study — •Torben Schindler, Martin Schmiele, Tilo Schmutzler, Christine Bauer, Caroline Weis, and Tobias Unruh — Work group nanomaterials characterization, Friedrich-Alexander University Erlangen Nuremberg, Staudtstr.3, 91058 Erlangen

Research on semiconductor nanoparticles (NPs) is of highest importance as the properties of the NPs can be adjusted due to the quantum size effect. For the integration in e.g. electronic devices or thin film solar cells, stable and well-defined NPs have to be designed, and knowledge about the nucleation and growth processes is crucial. The influence of surfactants is of highest importance as they have tremendous effects on the size and stability of the nanoparticles during preparation and storage, respectively.[1]

The influence of the stabilizer on the growth of zinc oxide nanoparticles was investigated using small angle neutron and X-ray scattering on the same sample. Only the use of both scattering techniques simultaneously allowed us to get detailed insight into the ripening process as SAXS is sensitive to the ZnO core and SANS to the stabilizing acetate shell. In this talk we will present the results from this combined approach to describe the ripening process not only by the changes of the size of the nanoparticles but also by the changes within the stabilizing layer which have a tremendous effect on the particle growth e.g. the stop of the ripening at a certain size.

[1]D. Segets et al., ACS Nano, 2011, 5 (6), 4658