Electrical transport through molecules has been much studied since it was proposed that individual molecules might behave like basic electronic devices, and intriguing single-molecule electronic effects have been demonstrated. But because transport properties are sensitive to structural variations on the atomic scale, further progress calls for detailed knowledge of how the functional properties of molecules depend on structural features. In this talk, I will describe some of our efforts to control organic linear nanostructure formation on silicon surfaces. I will then describe results from scanning tunneling microscopy and quantum mechanical modeling that show that the electrostatic field emanating from a fixed point charge regulates the conductivity of nearby organic nanostructures.

References:

[1] P. G. Piva, G. A. DiLabio, J. L. Pitters, J. Zikovsky, M. Rezeq, S. Dogel, W. A. Hofer, R. A. Wolkow, Nature 2005, 435, 658-661.

[2] G. A. DiLabio, P. G. Piva, P. Kruse, R. A. Wolkow, J. Am. Chem. Soc. 2004, 126, 16048-16050.

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