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A moving contact line as a rheometer for nanometric interfacial layers

Author

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  • Romain Lhermerout

    (Laboratoire de Physique Statistique de l’Ecole Normale Supérieure, UPMC Univ. Paris 6, Univ. Paris-Diderot)

  • Hugo Perrin

    (Physique et Mécanique des Milieux Hétérogènes, UMR 7636 ESPCI-CNRS, Univ. Paris-Diderot)

  • Etienne Rolley

    (Laboratoire de Physique Statistique de l’Ecole Normale Supérieure, UPMC Univ. Paris 6, Univ. Paris-Diderot)

  • Bruno Andreotti

    (Physique et Mécanique des Milieux Hétérogènes, UMR 7636 ESPCI-CNRS, Univ. Paris-Diderot)

  • Kristina Davitt

    (Laboratoire de Physique Statistique de l’Ecole Normale Supérieure, UPMC Univ. Paris 6, Univ. Paris-Diderot)

Abstract

How a liquid drop sits or moves depends on the physical and mechanical properties of the underlying substrate. This can be seen in the hysteresis of the contact angle made by a drop on a solid, which is known to originate from surface heterogeneities, and in the slowing of droplet motion on deformable solids. Here, we show how a moving contact line can be used to characterize a molecularly thin polymer layer on a solid. We find that the hysteresis depends on the polymerization index and can be optimized to be vanishingly small (

Suggested Citation

  • Romain Lhermerout & Hugo Perrin & Etienne Rolley & Bruno Andreotti & Kristina Davitt, 2016. "A moving contact line as a rheometer for nanometric interfacial layers," Nature Communications, Nature, vol. 7(1), pages 1-6, November.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms12545
    DOI: 10.1038/ncomms12545
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