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Issue 19, 2018
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Probing nano-scale viscoelastic response in air and in liquid with dynamic atomic force microscopy

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Abstract

We perform a comparative study of dynamic force measurements using an Atomic Force Microscope (AFM) on the same soft polymer blend samples in both air and liquid environments. Our quantitative analysis starts with calibration of the same cantilever in both environments. Intermodulation AFM (ImAFM) is used to measure dynamic force quadratures on the same sample. We validate the accuracy of the reconstructed dynamic force quadratures by numerical simulation of a realistic model of the cantilever in liquid. In spite of the very low quality factor of this resonance, we find excellent agreement between experiment and simulation. A recently developed moving surface model explains the measured force quadrature curves on the soft polymer, in both air and liquid.

Graphical abstract: Probing nano-scale viscoelastic response in air and in liquid with dynamic atomic force microscopy

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Publication details

The article was received on 19 Jan 2018, accepted on 17 Apr 2018 and first published on 17 Apr 2018


Article type: Paper
DOI: 10.1039/C8SM00149A
Citation: Soft Matter, 2018,14, 3998-4006
  • Open access: Creative Commons BY license
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    Probing nano-scale viscoelastic response in air and in liquid with dynamic atomic force microscopy

    F. Crippa, P. Thorén, D. Forchheimer, R. Borgani, B. Rothen-Rutishauser, A. Petri-Fink and D. B. Haviland, Soft Matter, 2018, 14, 3998
    DOI: 10.1039/C8SM00149A

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