Atomic force microscopy cantilever dynamics in liquid in the presence of tip sample interaction

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20 Citations (Scopus)

Abstract

We analyze the dynamics of an atomic force microscopy (AFM) cantilever oscillating in liquid at subnanometer amplitude in the presence of tip-sample interaction. We present AFM measurements of oscillatory solvation forces for octamethylcyclotetrasiloxane on highly oriented pyrolitic graphite and compare them to a harmonic oscillator model that incorporates the effect of the finite driving force for a typical AFM configuration with acoustic driving. In contrast to the general belief, we find—in both experiments and modeling—that the tip-sample interaction gives rise to a pronounced signature in the phase at driving frequencies well below resonance.
Original languageEnglish
Article number253106
Number of pages3
JournalApplied physics letters
Volume93
Issue number25
DOIs
Publication statusPublished - 2008

Keywords

  • METIS-252392
  • IR-73457

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