title: Polynomial force approximations and multifrequency atomic force microscopy.
abstract: We present polynomial force reconstruction from experimental intermodulation atomic force microscopy (ImAFM) data. We study the tip-surface force during a slow surface approach and compare the results with amplitude-dependence force spectroscopy (ADFS). Based on polynomial force reconstruction we generate high-resolution surface-property maps of polymer blend samples. The polynomial method is described as a special example of a more general approximative force reconstruction, where the aim is to determine model parameters that best approximate the measured force spectrum. This approximative approach is not limited to spectral data, and we demonstrate how it can be adapted to a force quadrature picture.
authors.affiliation: KTH Royal Institute of Technology, Section for Nanostructure Physics, Albanova University Center, SE-106 91 Stockholm, Sweden.
authors.forename: Daniel
authors.initials: D
authors.lastname: Platz
authors.forename: Daniel
authors.initials: D
authors.lastname: Forchheimer
authors.forename: Erik A
authors.initials: EA
authors.lastname: Tholén
authors.forename: David B
authors.initials: DB
authors.lastname: Haviland
keywords: AFM; atomic force microscopy; force spectroscopy; intermodulation; multifrequency; polynomial