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Universal contact-line dynamics at the nanoscale

Title data

Rivetti, Marco ; Salez, Thomas ; Benzaquen, Michael ; Raphaël, Elie ; Bäumchen, Oliver:
Universal contact-line dynamics at the nanoscale.
In: Soft Matter. Vol. 11 (October 2015) . - pp. 9247-9253.
ISSN 1744-6848
DOI: https://doi.org/10.1039/C5SM01907A

Abstract in another language

The relaxation dynamics of the contact angle between a viscous liquid and a smooth substrate is studied at the nanoscale. Through atomic force microscopy measurements of polystyrene nanostripes we simultaneously monitor both the temporal evolution of the liquid–air interface and the position of the contact line. The initial configuration exhibits high curvature gradients and a non-equilibrium contact angle that drive liquid flow. Both these conditions are relaxed to achieve the final state, leading to three successive regimes in time: (i) stationary contact line levelling; (ii) receding contact line dewetting; (iii) collapse of the two fronts. For the first regime, we reveal the existence of a self-similar evolution of the liquid interface, which is in excellent agreement with numerical calculations from a lubrication model. For different liquid viscosities and film thicknesses we provide evidence for a transition to dewetting featuring a universal critical contact angle and dimensionless time.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V > Chair Experimental Physics V - Univ.-Prof. Dr. Oliver Bäumchen
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 15 Oct 2020 11:08
Last Modified: 28 Oct 2020 11:45
URI: https://eref.uni-bayreuth.de/id/eprint/58375