Time-varying tip-sample force measurements confirm steady-state dynamics in tapping-mode atomic force microscopy

摘要

Direct time-varying tip-sample force measurements by torsional harmoniccantilevers facilitate detailed investigations of the cantilever dynamics intapping-mode atomic force microscopy. Here we report experimental evidence thatthe mathematical relationships describing the steady state dynamics arequantitatively satisfied by the independent measurements of tip-sample forcesover a broad range of experimental conditions. These results confirm theexisting understanding of the tapping-mode atomic force microscopy and buildconfidence on the reliability of time-varying tip-sample force measurements bythe torsional harmonic cantilevers.