MSE Colloquium - Prof. Harald Fuchs
Date: April 26, 2013 from 2:00 pm to 3:00 pm EDT
Location: Room 214, S. W. Mudd
Contact: For further information regarding this event, please contact Wesley Hattan by sending email to wjh2121@columbia.edu or by calling 2128547860.
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Generation and characterization of functional organic systems

Harald Fuchs

Physikalisches Institut and Center for Nanotechnology (CeNTech)

Westfalische Wilhelms-Universitat Munster, Germany

Institute of Nanotechnology, Karlsruhe Institute of Technology

Karlsruhe, Germany

 

The formation of chemical bonds depends strongly on the spatio-temporal conditions within an ensemble of starting molecules. We found that by using nanostructured surfaces on metallic single crystals, a significant increase of the reaction rate can be obtained, even with simple linear hydrocarbons exhibiting poor chemical reactivity. By imposing appropriate self-organized nano-confinements on the metallic surface which promote heterogeneous catalysis, polymerization of the linear monomeric units at mild conditions is obtained /1/. The concept can be extended to 2-dimensional Glaser-coupling reactions on low indexed surfaces /2/. The examples presented demonstrate new pathways to generate specific chemical bond formation which is unlikely to occur with conventional chemical techniques.

In the second part the generation of biomimetic systems will be discussed using DiPen Nanolithography (DPN) which is a non-energetic deposition technique. It allows us to write chemical diverse small structures for the interaction with biological systems such as biological cells. Recent developments and perspectives of these techniques will be presented /3/.

References:

/1/ D. Zhong, J.-H. Franke, S. Kumar Podiyanachari, T. Blomker, H. Zhang, G. Kehr, G. Erker, H. Fuchs, L. F. Chi,

Linear alkane polymerization on a gold surface; Science 334, 213-216 (2011)

 

/2/ H.-Y. Gao, H. Wagner, D. Zhong, J.-H. Franke, A. Studer, H.Fuchs

Glaser coupling on metal surfaces,  Angew. Chem. Int. Ed.  (in press)

 

/3/ S. Lenhert, F. Brinkmann, T. Laue, S. Walheim, C. Vannahme, S. Klinkhammer, M. Xu, S. Sekula, T. Mappes, T. Schimmel, H. Fuchs

Lipid multilayer gratings, Nature Nanotechnology 5, 275-279 (2010)

 

www.uni-muenster.de/Physik/PI/Fuchs

www.centech.de