Dresden 2009 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

SYSO: Symposium Self-organizing Surfaces and Interfaces

SYSO 1: Self-Organizing Surfaces and Interfaces I

SYSO 1.2: Hauptvortrag

Mittwoch, 25. März 2009, 14:30–15:00, BAR SCHÖ

Patterns and Pathways in Far-from-equilibrium Nanoparticle Assemblies — •Philip Moriarty¹, Andrew Stannard¹, Emmanuelle Pauliac-Vaujour¹, Matthew Blunt¹, Chris Martin¹, Ioan Vancea², and Uwe Thiele² — ¹School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, UK — ²Department of Mathematical Sciences, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK

Nanoparticle-solvent films deposited on solid substrates are associated with a rich dynamic behaviour which gives rise to a wide variety of striking self-organised patterns [1-4]. Although close-to-equilibrium self-assembly of nanoparticle arrays has been studied in some depth, there has been rather less work on solvent-nanoparticle systems driven far from equilibrium. In the far-from-equilibrium regime, a remarkably broad array of intricate, spatially correlated patterns form including "foam-like" cellular networks, labyrinthine structures similar to those formed in spinodal decomposition of binary fluids, and well-defined fractal morphologies. I shall focus on our recent results in two areas: (i) "coerced coarsening" of nanoparticle arrays where the system is mechanically driven towards equilibrium [3], and (ii) the use of scanning probe-defined silicon oxide patterns to direct solvent dewetting and thus control pattern formation in drying nanofluids [4].

1. G. Ge and L. Brus, J. Phys. Chem. B 104 9573 (2000) 2. E. Rabani et al., Nature 426 271 (2003); T.Bigioni et al., Nature Materials 5 265 (2006) 3. MO Blunt et al., Nature Nanotech. 2, 167 (2007) 4. CP. Martin et al., Phys. Rev. Lett. 99, 116103 (2007)