Influence of Slip on the Rayleigh-Plateau Rim Instability in Dewetting Viscous Films

Bäumchen, Oliver; Marquant, Ludovic; Blossey, Ralf; Münch, Andreas; Wagner, Barbara; Jacobs, Karin

doi:10.1103/physrevlett.113.014501

Cited by 40 publications

(53 citation statements)

References 37 publications

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“…The molecular weight dependence of the AF/PS slip length has previously been found in dewetting studies (Fig. 3a, orange squares) to increase sharply at large molecular weight [49,51,52], which contrasts with the leveling results ( Fig. 3a, blue circles) in the current work.…”

Section: Effect Of Molecular Weight On Slipcontrasting

confidence: 99%

“…For polymer fluids flowing across ultra-smooth, lowenergy surfaces, which act as ideal surfaces [50], dewetting experiments have measured large (> 1 µm) slip lengths [49,51,52]. These results confirmed the scaling of the slip length with molecular weight for polymeric fluids, as originally predicted by de Gennes based on connecting the Navier boundary condition to polymer theory [50].…”

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confidence: 72%

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Adsorption-induced slip inhibition for polymer melts on ideal substrates

et al. 2018

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Hydrodynamic slip, the motion of a liquid along a solid surface, represents a fundamental phenomenon in fluid dynamics that governs liquid transport at small scales. For polymeric liquids, de Gennes predicted that the Navier boundary condition together with polymer reptation implies extraordinarily large interfacial slip for entangled polymer melts on ideal surfaces; this Navier-de Gennes model was confirmed using dewetting experiments on ultra-smooth, low-energy substrates. Here, we use capillary leveling—surface tension driven flow of films with initially non-uniform thickness—of polymeric films on these same substrates. Measurement of the slip length from a robust one parameter fit to a lubrication model is achieved. We show that at the low shear rates involved in leveling experiments as compared to dewetting ones, the employed substrates can no longer be considered ideal. The data is instead consistent with a model that includes physical adsorption of polymer chains at the solid/liquid interface.

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Section: Effect Of Molecular Weight On Slipcontrasting

confidence: 99%

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confidence: 72%

Adsorption-induced slip inhibition for polymer melts on ideal substrates

et al. 2018

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“…Newtonian, viscous, non-slipping liquid on a rigid surface) [1,2]. The holes are tracked until the rim exhibits significant morphological changes due to undergoing an instability akin to the Plateau-Rayleigh instability (PRI) [44][45][46]. In the first part of this study, we investigate how the dewetting speed is influenced by changes in the isotropic strain of the capping elastomer.…”

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Liquid dewetting under a thin elastic film

et al. 2018

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We study the dewetting of liquid films capped by a thin elastomeric layer. When the tension in the elastomer is isotropic, circular holes grow at a rate which decreases with increasing tension. The morphology of holes and rim stability can be controlled by changing the boundary conditions and tension in the capping film. When the capping film is prepared with a biaxial tension, holes form with a non-circular shape elongated along the high tension axis. With suitable choice of elastic boundary conditions, samples can even be designed such that square holes appear.

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“…However, ranging up to tens of nanometers in some cases, b would be of significance not only to hydrodynamics on boundaries [37], but also to wetting dynamics [38]. Here we briefly remark on the validity of our assumption (b ¼ 0).…”

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In situDetermination of Surface Tension-to-Shear Viscosity Ratio for Quasiliquid Layers on Ice Crystal Surfaces

et al. 2015

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We have experimentally determined the surface tension-to-shear viscosity ratio (the so-called characteristic velocity) of quasiliquid layers (QLLs) on ice crystal surfaces from their wetting dynamics. Using an advanced optical microscope, whose resolution reaches the molecular level in the height direction, we directly observed the coalescent process of QLLs and followed the relaxation modes of their contact lines. The relaxation dynamics is known to be governed by the characteristic velocity, which allows us to access the physical properties of QLLs in a noninvasive way. Here we quantitatively demonstrate that QLLs, when completely wetting ices, have a thickness of 9 AE 3 nm and an approximately 200 times lower characteristic velocity than bulk water, whereas QLLs, when partially wetting ices, have a velocity that is 20 times lower than the bulk. This indicates that ice crystal surfaces significantly affect the physical properties of QLLs localized near the surfaces at a nanometer scale.

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Influence of Slip on the Rayleigh-Plateau Rim Instability in Dewetting Viscous Films

Cited by 40 publications

References 37 publications

Adsorption-induced slip inhibition for polymer melts on ideal substrates

Adsorption-induced slip inhibition for polymer melts on ideal substrates

Liquid dewetting under a thin elastic film

In situDetermination of Surface Tension-to-Shear Viscosity Ratio for Quasiliquid Layers on Ice Crystal Surfaces

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