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Controlling Pattern Formation in Nanoparticle Assemblies via Directed Solvent Dewetting

By CP Martin, MO Blunt, E Pauliac-Vaujour, A Stannard, P Moriarty, I Vancea and U Thiele


We have achieved highly localised control of pattern formation in two dimensional nanoparticle assemblies by direct modification of solvent dewetting dynamics. A striking dependence of nanoparticle organisation on the size of atomic force microscope-generated surface heterogeneities is observed and reproduced in numerical simulations. Nanoscale features induce rupture of the solvent-nanoparticle film, causing the local flow of solvent to carry nanoparticles into confinement. Microscale heterogeneities instead slow the evaporation of the solvent, producing a remarkably abrupt interface\ud between different nanoparticle patterns

Publisher: American Physical Society
Year: 2007
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Provided by: Nottingham ePrints

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