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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 4: Focus Session "Nanoparticles, Nanocrystals and Colloids" (jointly with MA)

CPP 4.2: Topical Talk

Montag, 14. März 2011, 10:45–11:15, HSZ 103

Directing the Self-Assembly of Nanoparticles — •Alexander Böker — DWI an der RWTH Aachen e.V. — Lehrstuhl für Makromolekulare Materialien und Oberflächen, RWTH Aachen

This talk deals with the use of different interfaces as templates for the self-assembly of various colloidal particles. First, we describe classical oil/water emulsion systems, the so-called Pickering Emulsions. Here, the controlled nanoparticle assembly can lead to permeable, yet robust membranes and capsules. Furthermore, fluid interfaces as found in block copolymer nanostructures can be employed. Here, the nanoparticles may impart specific functions to the nanostructures, such as magnetism or charge transport as required in magnetic data storage media or polymer-based photovoltaic devices, respectively.

Moreover, we demonstrate that wrinkled polydimethylsiloxane (PDMS) substrates, with wavelengths on the order of only a few hundred nanometers, guide the assembly of rod-like tobacco mosaic virus (TMV) nanoparticles or spherical microgels. Wrinkled substrates with pre-aligned nanoparticles are used as inked stamps to transfer large particle arrays onto flat substrates. The characteristic spacing and form of the structures can be controlled by the properties of the stamp.