Tip-surface forces, amplitude, and energy dissipation in amplitude-modulation (tapping mode) force microscopy
نویسندگان
چکیده
منابع مشابه
Inverting amplitude and phase to reconstruct tip-sample interaction forces in tapping mode atomic force microscopy.
Quantifying the tip-sample interaction forces in amplitude-modulated atomic force microscopy (AM-AFM) has been an elusive yet important goal in nanoscale imaging, manipulation and spectroscopy using the AFM. In this paper we present a general theory for the reconstruction of tip-sample interaction forces using integral equations for AM-AFM and Chebyshev polynomial expansions. This allows us to ...
متن کاملEnergy dissipation and dynamic response of an amplitude-modulation atomic-force microscopy subjected to a tip-sample viscous force.
In a common environment of atomic force microscopy (AFM), a damping force occurs between a tip and a sample. The influence of damping on the dynamic response of a cantilever must be significant. Moreover, accurate theory is very helpful for the interpretation of a sample's topography and properties. In this study, the effects of damping and nonlinear interatomic tip-sample forces on the dynamic...
متن کاملLinearity of amplitude and phase in tapping-mode atomic force microscopy
In this article tapping-mode atomic force microscope dynamics is studied. The existence of a periodic orbit at the forcing frequency is shown under unrestrictive conditions. The dynamics is further analyzed using the impact model for the tip-sample interaction and a spring-mass-damper model of the cantilever. Stability of the periodic orbit is established. Closed-form expressions for various va...
متن کاملCapillary forces in tapping mode atomic force microscopy
We investigated the influence of the relative humidity on amplitude and phase of the cantilever oscillation while operating an atomic force microscope ~AFM! in the tapping mode. If the free oscillation amplitude A0 exceeds a certain critical amplitude Ac , the amplitudeand phase-distance curves show a transition from a regime with a net attractive force between tip and sample to a net repulsive...
متن کاملPeak forces and lateral resolution in amplitude modulation force microscopy in liquid
The peak forces exerted on soft and rigid samples by a force microscope have been modeled by performing numerical simulations of the tip motion in liquid. The forces are obtained by using two contact mechanics models, Hertz and Tatara. We present a comparison between the numerical simulations and three analytical models for a wide variety of probe and operational parameters. In general, the for...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2001
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.64.193411