Dewetting pathways and morphology of unstable thin liquid bilayers

The Journal of Physical Chemistry. B
Dipankar Bandyopadhyay, A Sharma

Abstract

Three-dimensional long-wave nonlinear analysis of the instabilities engendered by van der Waals forces in a thin (<100 nm) viscous bilayer resting on a rigid substrate is presented. The bilayers are classified based on the macroscopic dewetting behavior of the films, and the three-dimensional morphological evolutions of the films are studied in each case. The dewetting of the bilayers is initiated by one of the two basic modes at the interfaces: in-phase "bending" and out-of-phase "squeezing". We show that the thicknesses, surface energies, and viscosities of the films have significant influence on the mode selection, pathway, of dewetting, and the final morphology of dewetting. Different equilibrium morphologies are obtained by tuning the nature and the strength of the intermolecular forces present at the films, which include: (i) an array of channels and ridges in the lower layer with the upper liquid embedded inside the channels, (ii) islands in the lower layer with the upper layer embedded in the interstitial spaces, and (iii) the lower layer droplets encapsulated by the upper layer.

References

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Citations

Jan 17, 2013·The Journal of Chemical Physics·Kartick MondalDipankar Bandyopadhyay
Jan 17, 2016·The Journal of Chemical Physics·C K SarikaJ K Basu
Dec 18, 2015·Journal of Colloid and Interface Science·Abhiram HensDipankar Bandyopadhyay
Sep 29, 2015·Soft Matter·Rabibrata Mukherjee, Ashutosh Sharma
Mar 19, 2013·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Abhiram HensDipankar Bandyopadhyay
May 15, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Dipankar BandyopadhyayP Dinesh Sankar Reddy
Feb 11, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Lin XuLijia An
Apr 11, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Dipankar BandyopadhyayChaitanya Rastogi
Dec 2, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Yan SunJin Wang

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