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178. 


Direct observation of the tunneling channels of a chemisorbed molecule



B. W. Heinrich, C. Iacovita, T. Brumme, D.-J. Choi, L. Limot, M. V. Rastei, W. A. Hofer, J. Kortus and J.-P. Bucher

Journal of Physical Chemistry Letters 1, 1517 (2010)

We exploit several scanning tunneling microscopy (STM) techniques, such as atom manipulated scans and constant-height scans, to atomically resolve the adsorption geometry of isolated cobalt-phthalocyanine (CoPc) molecules on a copper (111) surface and to obtain proper low-temperature maps of the molecular conductance. By comparing these crucial findings to density functional calculations, we then provide fresh insight into the CoPc-metal interface. This innovative STM study should be applicable to a wide variety of molecules relevant for molecular electronics.



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