Wednesday, May 11, 2011, 11:00 am — Bldg. 735 Conf Rm B
In this talk, I will discuss our recent results for single-molecule transport across junctions which have highly-conducting, direct Au-C bonds formed between the molecular Carbon atoms and the Au electrodes. Starting with trimethyltin (SnMe3)-terminated molecules, our results show that the SnMe3 linkers are cleaved in-situ at the junction as the experiment is performed, and that direct Au-C covalent bonds are formed. The resulting measured conductance for alkanes is approx. 100 times higher than with other linkers, opening a new pathway to reproducible and highly conducting metal-molecule contacts. In the talk, I will describe how first-principles transport calculations based on DFT explain the measured results and show how these Au-C links exhibit near ideal contact resistance.
Hosted by: Mark Hybertsen
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