Berlin 2008 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 21: POSTERS Colloids, Nanoparticles and Aggregates

CPP 21.14: Poster

Mittwoch, 27. Februar 2008, 16:00–18:30, Poster A

Low-dimensional nanoparticle chains formed via a dewetting water layer — •Leonid Govor¹, Günter Reiter², Gottfried H. Bauer¹, and Jürgen Parisi¹ — ¹Institute of Physics, University of Oldenburg, D-26111 Oldenburg, Germany — ²Institut de Chemie des Surfaces et Interfaces, CNRS, 68057 Mulhouse Cedex, France

We report on self-assembly of nanoparticles (diameter 6 nm) into low-dimensional close-packed arrays. This was achieved on substrates coated with a nitrocellulose (NC) thin layer by spreading of a hexane solution containing nanoparticles, hexadecylamine, and water. In a first step, the solution film transforms into a bilayer containing a hexane layer located onto a water film. The hexane layer dewets the water layer and the latter dewets the NC covered substrate. Dewetting of the water layer leads to the formation of water droplets. Finally, the particles follow the motion of the contact line of the dewetting water layer and thus assemble into close-packed arrays at the periphery of the water droplets.