Nonlinear viscoelastic dynamics of nano-confined water

Abstract

The viscoelastic dynamics of nano-confined water is studied by means of atomic force microscopy (AFM). 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 nano-confined water 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 nano-confined 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.

4 Figures

References in corpus (5)

• Cooperative motion and growing length scales in supercooled confined liquids
• Nonlinear viscoelasticity of metastable complex fluids
• Colloidal glass transition observed in confinement
• Direct measurement of molecular stiffness and damping in confined water layers
• A Molecular Hydrodynamic Theory of Supercooled Liquids and Colloidal Suspensions under Shear

Cited by in corpus (16)

• Dynamic Solidification in Nanoconfined Water Films
• Explaining the low-frequency shear elasticity of confined liquids
• Universal $L^{-3}$ finite-size effects in the viscoelasticity of confined amorphous systems
• General theory of the viscosity of liquids and solids from nonaffine particle motions
• Squeezing out the last 1 nanometer of water: A detailed nanomechanical study
• Unexpected thermo-elastic effects in liquid glycerol by mechanical deformation
• 3D confinement of water: H2O exhibits long-range (> 50 nm) structure while D2O does not
• Emergence of Debye scaling in the density of states of liquids under nanoconfinement
• A new tuning fork-based instrument for oscillatory shear rheology of nano-confined liquids
• A novel general modeling of the viscoelastic properties of fluids: application to mechanical relaxation and low frequency oscillation measurements of liquid water
• Quantum confinement theory of the heat capacity of thin films
• Thermal Shear Waves induced in Mesoscopic Liquids at Low Frequency Mechanical Deformation
• Translational diffusion of a fluorescent tracer molecule in nanoconfined water
• The effect of boundary slippage and nonlinear rheological response on flow of nanoconfined water
• Devitrification and Melting Dynamics in Vapor Deposited Water Ice
• Identification of Mechano-stimuli (Linear to Harmonic) Thermal Response in Mesoscopic Liquids