Tapping mode atomic force microscopy in liquid

Putman, Constant A.J.; Werf, Kees O. van der; Grooth, B.G. de; Hulst, Niek F. van; Greve, Jan

doi:10.1063/1.111597

Cited by 529 publications

(322 citation statements)

References 5 publications

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“…biological surfaces) or unstable surface features (e.g. small particles) [80][81][82][83][84][85][86].…”

Section: Tapping Mode Atomic Force Microscopy (Tm-afm)mentioning

confidence: 99%

Classification of Scanning Probe Microscopies

Friedbacher¹,

Fuchs²

1999

Pure and Applied Chemistry

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Republication or reproduction of this report or its storage and/or dissemination by electronic means is permitted without the need for formal IUPAC permission on condition that an acknowledgement, with full reference to the source along with use of the copyright symbol ᭧, the name IUPAC and the year of publication are prominently visible. Publication of a translation into another language is subject to the additional condition of prior approval from the relevant IUPAC National Adhering Organization.

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“…biological surfaces) or unstable surface features (e.g. small particles) [80][81][82][83][84][85][86].…”

Section: Tapping Mode Atomic Force Microscopy (Tm-afm)mentioning

confidence: 99%

Classification of Scanning Probe Microscopies

Friedbacher¹,

Fuchs²

1999

Pure and Applied Chemistry

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“…It was then largely replaced by intermittent contact techniques like tapping mode. 5,12 These methods all involve lock-in detection and operate near a resonance frequency of the cantilever. This allows for separation of elastic and viscous responses of the surface by measuring both amplitude and phase of the cantilever motion relative to the driving signal.…”

Section: Introductionmentioning

confidence: 99%

Unexplored territory in the AFM force curve contains nanomechanics information

Eppell

Zypman

2017

AIP Advances

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We demonstrate the existence of a previously unknown damped oscillating signal just after the point when an atomic force microscope tip hits a sample surface. This oscillating signal is below the noise in a single force-displacement measurement. Autocorrelating 20 measurements using the snap to contact feature as the reference mark allows the oscillation to be clearly visible above the noise. We show that the amplitude of the signal’s oscillation is largely insensitive to the speed with which the sample is brought toward the tip proving that the impulse that generates the signal comes primarily from the snap-to-contact event. This speed-independence sets a lower limit on how softly a sample may be interrogated when measuring mechanical properties in the surface region. Collection and analysis of this damped oscillating signal eliminates the need for standard low bandwidth lock-in based techniques to determine time dependent surface mechanical properties. This allows conventional atomic force microscopes to make a single pass of force collection over a surface and, after post-processing, yield the full time dependent mechanical behavior of the surface. To demonstrate a practical use of the oscillations, we produce images of a polystyrene/polyethylene sample where the contrast mechanisms are stiffness and viscosity.

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“…Magnetic, acoustic, and thermal (Brownian motion induced) excitations are commonly used for dynamic atomic force microscopy (AFM) in liquids [4]. Putman et al have used standard silicon nitride cantilevers, and extracted experimental amplitude-separation curve for tapping mode atomic force microscopy (AFM) in air and liquid and have considered differences between the diagrams in air and liquid [5].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of Tapping-mode Atomic Force Microscopy in Liquid

Korayem

Ebrahimi²,

Korayem³

2012

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Application of atomic force microscopy (AFM) in liquid is necessary for imaging and manipulation of biological specimens. In this paper, we have simulated a tapping-mode AFM tilted cantilever in liquid environment near a surface by well defining the contact forces and extracting frequency response and amplitude versus separation diagrams. Contact forces have some differences in liquid in comparison to air or vacuum in magnitude or formulation. Hydrodynamic forces are also applied on the cantilever due to the motion in liquid. For modeling we have used a continuous beam model with its first mode and forward-time simulation method for simulation of its hybrid dynamics. Then we have extracted frequency response and amplitude versus diagrams in liquid. The results show good agreement with experiments. The resonance frequency in liquid is so smaller in comparison to air due to additional mass and additional damping. The results show that the effect of separation on free vibration amplitude and resonance frequency is considerable.

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Tapping mode atomic force microscopy in liquid

Cited by 529 publications

References 5 publications

Classification of Scanning Probe Microscopies

Classification of Scanning Probe Microscopies

Unexplored territory in the AFM force curve contains nanomechanics information

Modeling and Simulation of Tapping-mode Atomic Force Microscopy in Liquid

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