Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 36: Microfluidics III: Soft Objects in Flow
CPP 36.3: Vortrag
Donnerstag, 26. März 2009, 16:30–16:45, ZEU 160
Self Assembled Supramolecular Structures using Microfluidic Gel Emulsions: Applications in Molecular Electronic Circuits — •Shashi Thutupalli1, Shuang Hou1, Ralf Seemann1,2, Marcel Mayor3, and Stephan Herminghaus1 — 1Max Planck Institute for Dynamics and Self-Organization, Göttingen, Germany — 2Experimental Physics, Saarland University, Saarbrücken, Germany — 3Department of Chemistry, University of Basel, Switzerland
Hierarchical supramolecular structures in nature are seamlessly linked over several length scales. Synthetic systems with similar integration have been built using two approaches - top down and bottom up. We employ a combination of both, using droplet microfluidics and molecular design, to demonstrate the possibility of self assembled molecular circuits. Using microfluidic gel emulsions, we generate 100's of lipid bilayers that can hold self inserting (amphiphilic) conducting molecules that span the bilayer. Aqueous compartments on either side of the bilayers are then used as electrical contacts establishing self assembled nanogaps for molecular electronics. Further, the droplets in the microfluidic channel assemble into precise arrangements, forming well controlled circuits of conducting molecular rods. Special integrated microelectrodes are used as electrical probes. In such a setup, we show insertion of an electrochromic dye, Di-4-ANEPPS into bilayers of monoolein and record its fluorescence intensity variation with an applied voltage. As a first step to building functional circuits, we also present preliminary results with synthetic conducting molecules.