Dynamics of the nanoneedle probe in trolling mode AFM

Ahmad Abdi, Hossein Nejat Pishkenari, Ramtin Keramati, Majid Minary-Jolandan

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


Atomic force microscopy (AFM), as an indispensable tool for nanoscale characterization, presents major drawbacks for operation in a liquid environment arising from the large hydrodynamic drag on the vibrating cantilever. The newly introduced 'Trolling mode' (TR-mode) AFM resolves this complication by using a specialized nanoneedle cantilever that keeps the cantilever outside of the liquid. Herein, a mechanical model with a lumped mass was developed to capture the dynamics of such a cantilever with a nanoneedle tip. This new developed model was applied to investigate the effects of the needle-liquid interface on the performance of the AFM, including the imaging capability in liquid.

Original languageEnglish (US)
Article number205702
Issue number20
StatePublished - May 22 2015
Externally publishedYes


  • dynamic AFM
  • hydrodynamic dissipation
  • lumped mass model
  • meniscus
  • quality factor

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering


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