COLL 493 |
| James D. Batteas1, Jayne C. Garno1, Christina A. Hacker2, Christopher D. Zangmeister3, and Aric M. Opdahl3. (1) Surface and Microanalysis Science Division, National Institute of Standards and Technology, 100 Bureau Drive Mailstop 8372, Gaithersburg, MD 20899, (2) Semiconductor Electronics Division, National Institute of Standards and Technology, 100 Bureau Drive, Mail stop 8121, Gaithersburg, MD 20899, (3) Process Measurements Division, National Institute of Standards & Technology, 100 Bureau Drive, Gaithersburg, MD 20899 |
| A significant challenge exists in understanding and predicting electron transport in metal-molecule-metal junctions important in molecular based electronic and optical systems. As the electrical behavior of molecules depends on their chemistry and organization at metal contacts, we have carried out a series of STM experiments on alkanethiols with varying molecular orientations, as well as molecular wires of unsubstitued and fluorinated oligo-phenylene-ethynylene (OPE) compounds. Differences in the tunneling behavior of various phases of dodecanethiol and OPEs will be described. Utilizing dodecanethiol as a reference molecule, we are also constructing test arrays consisting of an alkanethiol matrix with other molecules of interest, such as OPE, patterned into structures of specific nanoscale dimensions. Restricting the geometric space available for molecules like OPE to self-assemble appears to impact their final structure and potentially their local transport properties. |
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Nanoscience and Nanotechnology
8:30 AM-11:45 AM, Thursday, April 1, 2004 Marriott -- Orange County 5, Oral
Division of Colloid and Surface Chemistry |