Dresden 2011 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 43: Nanoparticles and Composite Materials I
CPP 43.9: Vortrag
Donnerstag, 17. März 2011, 16:30–16:45, ZEU 222
Structure formation during evaporation of a droplet of PEG coated gold nanoparticles on a heterogeneous surface of block copolymers- an in situ μGISAXS combined with ellipsometry study — •Mottakin M. Abul Kashem1, Volker Körstgens2, Monika Rawolle2, Adeline Buffet1, Gerd Herzog1, Matthias Schwartzkopf1, Gunthard Benecke1, Jan Perlich1, Rainer Gehrke1, Peter Müller-Buschbaum2, and Stephan V. Roth1 — 1DESY, Hamburg, Germany — 2TU München, Physik Department, LS Funkt. Mat., Garching, Germany
We have investigated the nanostructures formed on top of a block copolymer film surface during evaporation of the solvent of a dispersion of gold nanoparticles coated with PEG ligands. The copolymer film contained regular array of PMMA domains in the matrix of PS [1].Presence of ligands can, in the one hand, enhance the selectivity of adsorption and in the other hand, can slow down the migrational flow of the nanoparticles. As a result, several phenomena including selective adsorption, evaporation induced multiscale nanostructures formation and mesoscopic crystallization can be observed [2]. All these open questions have been investigated with in situ micro-beam grazing incidence small angle X-ray scattering (in situ μGISAXS) in combination with in-situ ellipsometry [3, 4] at P03 (MiNaXS) beamline of PETRA III storage ring of HASYLAB at DESY, Hamburg, Germany. [1] Abul Kashem et. al. Macromolecules, 42, 6202 (2009). [2] Roth et. al. Langmuir, 26, 1496 (2010). [3] Müller-Buschbaum, P. Anal. Bioanal. Chem. 376, 3 (2003). [4] Körstgens et. al.Anal. Bioanal. Chem. 396, 139 (2010).