Berlin 2012 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 8: Poster: Nanoparticles and Composite Materials

CPP 8.29: Poster

Monday, March 26, 2012, 17:30–20:00, Poster A

Particle Nanosomes with Tailored Silhouettes — Claudia Wagner¹, •Andrea Fortini², Eddie Hofmann¹, Thomas Lunkenbein³, Matthias Schmidt², and Alexander Wittemann¹ — ¹Physikalische Chemie I, Universität Bayreuth, Universitaetsstr. 30, D- 95440 Bayreuth, Germany — ²Theoretische Physik II, Universität Bayreuth, Universitaetsstr. 30, D-95440 Bayreuth, Germany. — ³Anorganische Chemie I, Universität Bayreuth, Universitaetsstr. 30, D- 95440 Bayreuth, Germany.

We investigate the assembly of submicron capsules with walls that consist of a single layer of nanoscopic inorganic constituents. Nanoparticles and oppositely charged polymer colloids were joined at the surface of evaporating emulsion droplets. The heteroaggregates exhibited well-defined core-shell morphologies, with clusters of the polymer colloids as the core and a dense monolayer of nanoparticles as the shell. Subsequent removal of the polymer core led to capsules, which exhibited regular compartmentalized shapes. A high density of nanopores was obtained on objects with dimensions of less than half a micron. Regardless that the capsules consisted of a single layer of nanoparticles with few contacts keeping them together, they did not collapse or break apart. Monte Carlo computer simulations demonstrated that the nanoscopic constituents can be trapped into structurally arrested states.