Berlin 2005 – scientific programme
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CPP: Chemische Physik und Polymerphysik
CPP 2: SYMPOSIUM: Dynamics of multi-component fluids II
CPP 2.3: Talk
Friday, March 4, 2005, 12:00–12:15, TU C243
Hierarchical Self-Assembly of CdSe Nanoparticles: Capsules, Membranes and Sensing Devices — •Alexander Böker1, Yao Lin2, Heiko Zettl1, Kevin Sill2, David Cookson3, A.D. Dinsmore4, Todd Emrick2, and Thomas P. Russell2 — 1Lehrstuhl für Physikalische Chemie II, Universität Bayreuth, 95440 Bayreuth, Germany — 2Department of Polymer Science and Engineering, University of Massachusetts, Amherst, MA 01003, USA — 3Australian Synchrotron Research Program, Bld. 434, APS, Argonne IL 60439, USA — 4Department of Physics, University of Massachusetts, Amherst, MA 01003, USA
We report on the self assembly of ligand stabilized CdSe nanoparticles at oil-water or polymer-polymer interfaces as templates for the generation of encapsulation and delivery as well as sensing devices. Furthermore, we studied the dynamics of the nanoparticle self-assembly and the structures formed at a fluid interface, using a pendant drop tensiometer, confocal fluorescence microscopy, TEM, FE-SEM and in-situ GISAXS. In general, we find a monolayer of particles exhibiting liquid-like behavior and ordering at the interfaces. Crosslinking of the nanoparticle assembly using surface functionalities affords robust membranes that maintain their integrity even when they are removed from the interface, while the properties unique to the nanoparticles are preserved.