Nonlinear viscoelastic dynamics of nanoconfined wetting liquids

Tai De Li, Elisa Riedo

Research output: Contribution to journalArticle

Abstract

The viscoelastic dynamics of nanoconfined wetting liquids is studied by means of atomic force microscopy. We observe a nonlinear viscoelastic behavior remarkably similar to that widely observed in metastable complex fluids. We show that the origin of the measured nonlinear viscoelasticity in nanoconfined water and silicon oil is a strain rate dependent relaxation time and slow dynamics. By measuring the viscoelastic modulus at different frequencies and strains, we find that the intrinsic relaxation time of nanoconfined water is in the range 0.1-0.0001 s, orders of magnitude longer than that of bulk water, and comparable to the dielectric relaxation time measured in supercooled water at 170-210 K.

Original languageEnglish (US)
Article number106102
JournalPhysical Review Letters
Volume100
Issue number10
DOIs
StatePublished - Mar 13 2008

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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