AVS 60th International Symposium and Exhibition
    Nanometer-scale Science and Technology Wednesday Sessions
       Session NS+BI+EM-WeA

Paper NS+BI+EM-WeA2
Tunneling Electron Induced Adsorption of Copper Phthalocyanine on the Cu(111) Surface

Wednesday, October 30, 2013, 2:20 pm, Room 203 B

Session: Nanopatterning and Nanolithography
Presenter: T. Stock, University of Toronto, Canada
Authors: T. Stock, University of Toronto, Canada
J. Nogami, University of Toronto, Canada
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The adsorption of up to one monolayer (ML) of copper phthalocyanine (CuPc) molecules on a room temperature Cu(111) surface has been studied using scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS). Below 1 ML the molecules are in a fluid state and are highly mobile on the surface. At 1 ML coverage the molecules coalesce into a highly ordered 2D crystal phase. At sub-ML coverages, adsorption of individual CuPc molecules can be induced through exposure to tunneling electrons at a bias voltage exceeding a threshold value . This tunneling electron induced adsorption effect allows for a novel variety of molecular STM lithography, and permits probing of the mechanisms involved in the adsorption of individual molecules.