Regensburg 2010 – scientific programme

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O: Fachverband Oberflächenphysik

O 50: [CPP] Organic Electronics and Photovoltaics III (Joint Session DS/CPP/HL/O)

O 50.12: Talk

Wednesday, March 24, 2010, 12:30–12:45, H37

DNA Based Molecular Electronics Using Mercury Droplets in Microfluidic Channels — •Shuang Hou, Shashi Thutupalli, and Stephan Herminghaus — Max Planck Institute for Dynamics and Self Organization, D-37073, Göttingen, Germany

Mercury droplets in microfluidic channels are used as electrodes to investigate the electronic properties of single strand DNA (ssDNA) molecules. In this system, a self assembled monolayer (SAM) of thiolated DNA oligomers (~ 5 nm length) of specific base sequences is formed on the surface of mercury droplets. Two such droplets are then brought together by microfluidic manipulation to form a mercury-ssDNA-mercury electrical junction. We identified single SAMs of ssDNA oligos, double SAMs of ssDNA oligos of the same composition, and complementary binding DNA composed junctions. Here, we report the influence of base pair type and DNA sequence length to the electronic characteristics. On the basis of these results, the design of DNA based molecular electronic elements (such as diodes) seems possible.