title: Distinguishing elastic shear deformation from friction on the surfaces of molecular crystals.
abstract: Elastic deformation on the surfaces of molecular crystals can be imaged using a variant of lateral force microscopy in which the tip is scanned parallel to the cantilever axis. The shear force transverse to this direction has a distinctly different origin than the friction force as determined by the tip velocity and temperature dependence of the cantilever torque. An elastic deformation model for the tip-sample interaction predicts the crystallographic anisotropy of the transverse shear contrast, establishing its connection with the relative magnitude of the in-plane elastic tensor components.
authors.affiliation: Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis 55455, USA.
authors.forename: Vivek
authors.initials: V
authors.lastname: Kalihari
authors.forename: Greg
authors.initials: G
authors.lastname: Haugstad
authors.forename: C Daniel
authors.initials: CD
authors.lastname: Frisbie