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Issue 2, 2016
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Probing viscoelastic response of soft material surfaces at the nanoscale

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Abstract

We study the interaction between an AFM tip and a soft viscoelastic surface. Using a multifrequency method we measure the amplitude-dependence of the cantilever dynamic force quadratures, which clearly show the effect of finite relaxation time of the viscoelastic surface. A model is introduced which treats the tip and surface as a two-body dynamic problem with a nonlinear interaction depending on their separation. We find good agreement between simulations of this model and experimental data on polymer blend samples for a variety of materials and measurement conditions.

Graphical abstract: Probing viscoelastic response of soft material surfaces at the nanoscale

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Submitted
26 Aug 2015
Accepted
14 Oct 2015
First published
14 Oct 2015

Soft Matter, 2016,12, 619-624
Article type
Paper
Author version available

Probing viscoelastic response of soft material surfaces at the nanoscale

D. B. Haviland, C. A. van Eysden, D. Forchheimer, D. Platz, H. G. Kassa and P. Leclère, Soft Matter, 2016, 12, 619
DOI: 10.1039/C5SM02154E

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