title: Interactions between two C60 molecules measured by scanning probe microscopies.
abstract: C60-functionalized tips are used to probe C60 molecules on Cu(111) with scanning tunneling and atomic force microscopy. Distinct and complex intramolecular contrasts are found. Maximal attractive forces are observed when for both molecules a [6,6] bond faces a hexagon of the other molecule. Density functional theory calculations including parameterized van der Waals interactions corroborate the observations.
authors.affiliation: Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, D-24098 Kiel, Germany. Institute for Molecules and Materials, Radboud University, 6500 GL Nijmegen, The Netherlands.
authors.forename: Nadine
authors.initials: N
authors.lastname: Hauptmann
authors.forename: César
authors.initials: C
authors.lastname: González
authors.forename: Fabian
authors.initials: F
authors.lastname: Mohn
authors.forename: Leo
authors.initials: L
authors.lastname: Gross
authors.forename: Gerhard
authors.initials: G
authors.lastname: Meyer
authors.forename: Richard
authors.initials: R
authors.lastname: Berndt