Regensburg 2010 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 36: Poster: Nanoparticles and Composite Materials
CPP 36.8: Poster
Wednesday, March 24, 2010, 17:30–19:00, Poster B2
Precursor loaded PMMA-Colloids: A opportunity to structure arrays of non-closed-packed hexagonally ordered Pt-nanoparticles — •Fabian Enderle1, Bernd Schüler1, Alfred Plettl1, Paul Ziemann1, Eyk Schreiber2, Ulrich Ziener2, and Katharina Landfester3 — 1Institut für Festkörperphysik, Universität Ulm, D-89069 Ulm — 2Institut für Organische Chemie III, Universität Ulm, D-89069 Ulm — 3MPI für Polymerforschung, D-55128 Mainz
Platinum-precursor loaded colloidal polymethylmethacrylate (PMMA) particles are produced in aqueous solution by a miniemulsion and emulsion technique. The particles were deposited on top of a silicon substrate in a hexagonally ordered monolayer. Such layers were patterned by exposing the colloids to an electron beam or deep ultra violet photons. Then the exposed colloids were removed by a commercial remover. Results on both techniques will be reported and their principal limits discussed. After patterning a monolayer of PMMA spheres, an optimized plasma and annealing step in oxygen is applied to obtain Platinum nanoparticles which still exhibit the original lateral order. The deposited colloids and nanoparticles are analyzed by optical microscope, HRSEM and, due to the electron sensitivity of PMMA, also by AFM. Small precursor loaded PMMA particles show the same behaviour as small Polystyrene particles during the processing [1]. Large precursor loaded PMMA particles behave differently and require further development of the chemical and physical fabrication process.
[1] A. Manzke et al. Adv. Mater. 19, 1337 (2007)