Dynamic force spectroscopy using cantilever higher flexural modes

  • Sugimoto Y
  • Innami S
  • Abe M
 et al. 
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By means of force spectroscopy measurements performed with the cantilever first and second flexural modes under the frequency modulation detection method, the authors corroborate the validity of the relation between tip-surface interaction force and frequency shift for force spectroscopy acquisition using higher cantilever eigenmodes. They est. a cantilever effective stiffness for the second eigenmode 73 times larger than the static stiffness. This large effective stiffness enables them to perform force spectroscopy with a cantilever oscillation amplitude (A0) as small as 3.6 A. The authors provide exptl. evidence that, at such small A0 values, normalized frequency shift curves deviate from a A03/2 scaling and the signal-to-noise ratio is considerably enhanced.

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  • Yoshiaki Sugimoto

  • Seiji Innami

  • Masayuki Abe

  • Óscar Custance

  • Seizo Morita

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