title: Charge state control of molecules reveals modification of the tunneling barrier with intramolecular contrast.
abstract: From scanning tunneling microscopy and spectroscopy experiments it is shown that control over the charge-state of individual molecules adsorbed on surfaces can be obtained by choosing a substrate system with an appropriate workfunction. The distribution of the additional charge is studied using difference images. These images show marked intramolecular contrast.
authors.affiliation: Institute of Experimental and Applied Physics, University of Regensburg, 93053 Regensburg, Germany. Ingmar.Swart@physik.uni-regensburg.de
authors.forename: Ingmar
authors.initials: I
authors.lastname: Swart
authors.forename: Tobias
authors.initials: T
authors.lastname: Sonnleitner
authors.forename: Jascha
authors.initials: J
authors.lastname: Repp
mesh_terms: D004579:Electron Transport; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D055672:Static Electricity; D013499:Surface Properties