Combining imaging ellipsometry and grazing incidence small angle X-ray scattering for in situ characterization of polymer nanostructures |
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Authors: | Volker Körstgens Johannes Wiedersich Robert Meier Jan Perlich Stephan V Roth Rainer Gehrke Peter Müller-Buschbaum |
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Institution: | 1. Physik-Department E13, Technische Universit?t München, James-Franck-Str. 1, 85747, Garching, Germany 2. HASYLAB at DESY, Notkestr. 85, 22603, Hamburg, Germany
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Abstract: | A combination of microbeam grazing incidence small angle X-ray scattering (μGISAXS) and imaging ellipsometry is introduced
as a new versatile tool for the characterization of nanostructures. μGISAXS provides a local lateral and depth-sensitive structural
characterization, and imaging ellipsometry adds the position-sensitive determination of the three-dimensional morphology in
terms of thickness, roughness, refractive index, and extinction coefficient. Together μGISAXS and imaging ellipsometry enable
a complete characterization of structure and morphology. On the basis of an example of buildup of nanostructures from monodisperse
colloidal polystyrene nanospheres on a rough solid support, the scope of this new combination is demonstrated. Roughness is
introduced by a dewetting structure of a diblock copolymer film with one block being compatible with the colloidal nanoparticles
and one block being incompatible. To demonstrate the potential for kinetic investigations, μGISAXS and imaging ellipsometry
are applied to probe the drying process of an aqueous dispersion of nanospheres on such a type of rough substrate. |
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