Atomic Force Microscopy at Ultrasonic Frequencies

Arnold, W.; Hirsekorn, S.; Kopycinska, Malgorzata; Rabe, U.

doi:10.1299/jsmeatemapcfs.1.01.203.0_41

Cited by 1 publication

(2 citation statements)

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“…To overcome the limitations of the conventional quasi-static FFM, such as slow scanning speed and lack of stability on many samples under ambient conditions, dynamic operation modes are proposed [4]. Contact resonance spectroscopy and Atomic Force Acoustic Microscopy (AFAM) via direct detection of the bending modes of the cantilever have been developed during the last decade [5][6][7]. These techniques are based on the fact that an AFM cantilever can be considered as an elastic beam with characteristic flexural vibration resonance frequencies.…”

Section: Introductionmentioning

confidence: 99%

“…In-plane sample surface vibrations polarized parallel to the length axis of the cantilever lead to cantilever buckling vibrations which can be used to measure friction [11]. Torsional cantilever vibrations can be excited by in-plane sample surface vibrations polarized perpendicularly to the length axis of the cantilever [6]. At low excitation amplitudes (about 0.1 nm), the amplitude and phase of the resulting cantilever vibration contain information about the local lateral tip-sample stiffness [4,12].…”

Section: Introductionmentioning

confidence: 99%

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Investigating ultra-thin lubricant layers using lateral atomic force acoustic microscopy

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Rabe

Hirsekorn

et al.

IEEE Ultrasonics Symposium, 2004

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The ultrasonic friction mode of an atomic force microscope is a scanning probe technique allowing one to analyze the load and velocity dependence of friction. The technique is based on the evaluation of the resonance behavior of an AFM cantilever when in contact with a vibrating sample surface. The effect of load and lateral displacement of the sample surface on the shape of the torsional resonance spectra of the AFM cantilever is evaluated under dry and lubricated sliding conditions. A characteristic flattening of the torsional resonance curve has been observed at large surface displacements, resulting from the onset of sliding friction in the contact of the AFM cantilever tip with the sample surface. This is confirmed by an analytical model describing torsional cantilever vibrations in case of a Hertzian, i.e. purely elastic, contact and by numerical simulations of the cantilever vibrations

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