Force reconstruction from tapping mode force microscopy experiments

Payam, Amir Farokh; Martín-Jiménez, Daniel; García, Ricardo García

doi:10.1088/0957-4484/26/18/185706

Cited by 64 publications

(73 citation statements)

References 54 publications

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“…The force reconstruction process involves an integration of the observables along the tip's trajectory. [118][119][120] The integration generates some numerical errors. In addition, to get the density by inverting Eq.…”

Section: Hydration Layers On Biomolecules and Lipidsmentioning

confidence: 99%

Atomic- and Molecular-Resolution Mapping of Solid–Liquid Interfaces by 3D Atomic Force Microscopy

2018

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Hydration layers are ubiquitous in life and technology. Hence interfacial aqueous layers have a central role in a wide range of phenomena from material sciences to molecular and cell biology. A complete understanding of those processes requires, among other things, the development of very sensitive and high-resolution instruments. Three-dimensional AFM (3D-AFM) represents the latest and most successful attempt to generate atomically-resolved threedimensional images of solid-liquid interfaces. This review provides an overview of the 3D-AFM operating principles and its underlying physics. We illustrate and explain the capability of the instrument to resolve atomic defects on crystalline surfaces immersed in liquid. We also illustrate some of its applications to imaging the hydration structures on DNA or proteins. In the last section we discuss some perspectives on emerging applications in materials science and molecular biology.

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Section: Hydration Layers On Biomolecules and Lipidsmentioning

confidence: 99%

Atomic- and Molecular-Resolution Mapping of Solid–Liquid Interfaces by 3D Atomic Force Microscopy

2018

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“…, frequency shift, spring constant and Quality factor Q, into force vs. distance measurements. Other expressions for force inversion were derived in parallel by several groups in FM-AFM [39,40] and AM-AFM [41,42,43,44]; but it is arguably the expression of Sader et al that has been mostly implemented in order to quantify surface water interactions, the hydration layer and more generally solid-liquid interfaces via force-spectroscopy methods. For example, in 2010, a three-dimensional scanning force microscopy (3D-SFM) method that enables visualization of the water distribution at a solid-liquid interface was introduced [45].…”

Section: Dynamic Afmmentioning

confidence: 99%

Imaging Water Thin Films in Ambient Conditions Using Atomic Force Microscopy

Santos¹,

Verdaguer

2016

Materials

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All surfaces exposed to ambient conditions are covered by a thin film of water. Other than at high humidity conditions, i.e., relative humidity higher than 80%, those water films have nanoscale thickness. Nevertheless, even the thinnest film can profoundly affect the physical and chemical properties of the substrate. Information on the structure of these water films can be obtained from spectroscopic techniques based on photons, but these usually have poor lateral resolution. When information with nanometer resolution in the three dimensions is needed, for example for surfaces showing heterogeneity in water affinity at the nanoscale, Atomic Force Microscopy (AFM) is the preferred tool since it can provide such resolution while being operated in ambient conditions. A complication in the interpretation of the data arises when using AFM, however, since, in most cases, direct interaction between a solid probe and a solid surface occurs. This induces strong perturbations of the liquid by the probe that should be controlled or avoided. The aim of this review is to provide an overview of different AFM methods developed to overcome this problem, measuring different interactions between the AFM probe and the water films, and to discuss the type of information about the water film that can be obtained from these interactions.

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“…The force-inversion methods offer an alternative but these methods provide the force estimation on an a posteriori basis . Moreover, those methods could be very time consuming to tune for non-expert enthusiastic AFM experimentalists and their accuracy is under debate within the dynamic AFM community [16–17]. …”

Section: Introductionmentioning

confidence: 99%

Scaling law to determine peak forces in tapping-mode AFM experiments on finite elastic soft matter systems

Guzman

2017

Beilstein J. Nanotechnol.

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Analytical equations to estimate the peak force will facilitate the interpretation and the planning of amplitude-modulation force microscopy (tapping mode) experiments. A closed-form analytical equation to estimate the tip–sample peak forces while imaging soft materials in liquid environment and within an elastic deformation regime has been deduced. We have combined a multivariate regression method with input from the virial–dissipation equations and Tatara’s bidimensional deformation contact mechanics model. The equation enables to estimate the peak force based on the tapping mode observables, probe characteristics and the material properties of the sample. The accuracy of the equation has been verified by comparing it to numerical simulations for the archetypical operating conditions to image soft matter with high spatial resolution in tapping-mode AFM.

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Force reconstruction from tapping mode force microscopy experiments

Cited by 64 publications

References 54 publications

Atomic- and Molecular-Resolution Mapping of Solid–Liquid Interfaces by 3D Atomic Force Microscopy

Atomic- and Molecular-Resolution Mapping of Solid–Liquid Interfaces by 3D Atomic Force Microscopy

Imaging Water Thin Films in Ambient Conditions Using Atomic Force Microscopy

Scaling law to determine peak forces in tapping-mode AFM experiments on finite elastic soft matter systems

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