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Long-range hydrodynamic forces in liquid FM-AFM

Devailly, Clémence and Bouriat, Patrick and Dicharry, Christophe and Risso, Frédéric and Ondarçuhu, Thierry and Tordjeman, Philippe Long-range hydrodynamic forces in liquid FM-AFM. (2020) Nanotechnology, 31 (45). 455501. ISSN 0957-4484

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Official URL: https://doi.org/10.1088/1361-6528/aba786

Abstract

We study the effects of hydrodynamic forces in frequency-modulation AFM experiments (FM-AFM) in liquid. We first establish the theoretical equations needed to derive the interaction stiffness k_int and the damping β_int due to the hydrodynamic forces from the frequency shift and the excitation amplitude. We develop specific FM-AFM experiments to measure the variation of k_int and β_int over a large range of distance in water up to 200 μm. Comparison between theory and experiments point out that the evolution of k_int at short and long distance arises from unsteady hydrodynamic forces on the cantilever. On the other hand, βint is small at long distance and diverges at short probe-surface distance, as predicted by the classical Reynolds sphere model.

Item Type:Article
HAL Id:hal-02991839
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Total (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université de Pau et des Pays de l'Adour - UPPA (FRANCE)
Laboratory name:
Funders:
Institut Carnot ISIFOR
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Deposited On:21 Sep 2020 15:11

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