Dresden 2006 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 5: Polyelectrolytes
CPP 5.9: Vortrag
Montag, 27. März 2006, 16:45–17:00, ZEU 160
Polypyrrole Nanowires Grown From Single Adsorbed Polyelectrolyte Molecules — •Anton Kiriy1, Vera Bocharova1, Manfred Stamm1, Hartmut Vinzelberg2, and Ingolf Mönch2 — 1Leibniz Institute of Polymer Research Dresden, D-01069 Dresden — 2Leibniz Institute for Solid State and Materials Research, D-01069 Dresden
One-dimensional nanostructures of conductive polymers have attracted a great interest as building blocks for future miniatuarized nanoelectronic devices and highly sensitive chemical or biological sensors. We have developed a simple chemical route to conductive polypyrrole nanowires by the grafting of polypyrrole from isolated synthetic polyelectrolyte molecules. The location and length of the synthesized Ppy nanowires are defined by the location and length of adsorbed single-molecule templates. Diameter of the nanowires varies from few nanometers to hundreds of nanometers and can be adjusted by polycondensation time and concentration of reagents. The dc conductivity of individual polypyrrole nanowires approaches the conductivity of polypyrrole in the bulk. A possibility to use the nanowires as active elements of sensors on acids and bases was evaluated. These results open broad opportunities for fabrication of electronic devices and sensors at molecular level (Bocharova, V.; Kiriy, A.; Vinzelberg, H.; Mönch, I.; Stamm, M. Angew. Chem. Int. Ed. 2005, 44, 6391).