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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(Document in English)
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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 |
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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 |
Statistics: | download |
Deposited On: | 21 Sep 2020 15:11 |
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