Role of attractive forces in tapping tip 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 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 کاملHarnessing bifurcations in tapping-mode atomic force microscopy to calibrate time-varying tip-sample force measurements.
Torsional harmonic cantilevers allow measurement of time-varying tip-sample forces in tapping-mode atomic force microscopy. Accuracy of these force measurements is important for quantitative nanomechanical measurements. Here we demonstrate a method to convert the torsional deflection signals into a calibrated force wave form with the use of nonlinear dynamical response of the tapping cantilever...
متن کاملMolecular dynamic simulation of tip-polymer interaction in tapping-mode atomic force microscopy
We present a molecular dynamic study of the interaction between an amorphous silica tip (SiO 2) and an amorphous poly-(methyl-methacrylate) substrate under conditions relevant for tapping-mode atomic force microscopy. To capture the actual dynamics of the tip, we use the dynamic contact simulation method [Kim et al., J. Appl. Phys. 112, 094325 (2012)]. We obtain force-displacement relationships...
متن کاملTip Pressure on Semicircular Specimens in Tapping Mode Atomic Force Microscopy in Viscous Fluid Environments
Tapping mode (TM) atomic force microscopy (AFM) in a liquid environment is widely used to measure the contours of biological specimens. The TM triggers the AFM probe approximately at the resonant frequencies and controls the tip such that it periodically touches the specimen along the scanning path. The AFM probe and its tip produce a hydrodynamic pressure on the probe itself and press the spec...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 1997
ISSN: 0021-8979,1089-7550
DOI: 10.1063/1.365194