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Title: Electrohydrodynamic instabilities in thin liquid trilayer films

Journal Article · · Physics of Fluids
DOI:https://doi.org/10.1063/1.3520134· OSTI ID:1076460
 [1];  [1]
  1. Univ. of Minnesota, Minneapolis, MN (United States)

Experiments by Dickey and Leach show that novel pillar shapes can be generated from electrohydrodynamic instabilities at the interfaces of thin polymer/polymer/air trilayer films. In this paper, we use linear stability analysis to investigate the effect of free charge and ac electric fields on the stability of trilayer systems. Our work is also motivated by our recent theoretical study which demonstrates how ac electric fields can be used to increase control over the pillar formation process in thin liquid bilayer films. For perfect dielectric films, the effect of an AC electric field can be understood by considering an equivalent DC field. Leaky dielectric films yield pillar configurations that are drastically different from perfect dielectric films, and AC fields can be used to control the location of free charge within the trilayer system. This can alter the pillar instability modes and generate smaller diameter pillars when conductivities are mismatched. The results presented may be of interest for the creation of complex topographical patterns on polymer coatings and in microelectronics.

Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
FG02-07ER46415; AC04-94AL85000
OSTI ID:
1076460
Journal Information:
Physics of Fluids, Vol. 22, Issue 12; ISSN 1070-6631
Publisher:
American Institute of PhysicsCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 44 works
Citation information provided by
Web of Science

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  • Janes, Dustin W.; Katzenstein, Joshua M.; Shanmuganathan, Kadhiravan
  • Journal of Polymer Science Part B: Polymer Physics, Vol. 51, Issue 7 https://doi.org/10.1002/polb.23262
journal February 2013
From electrodiffusion theory to the electrohydrodynamics of leaky dielectrics through the weak electrolyte limit journal September 2018
The electrostatically forced Faraday instability: theory and experiments journal January 2019
Electric field mediated elastic contact lithography of thin viscoelastic films for miniaturized and multiscale patterns journal January 2018
Stability of horizontal viscous fluid layers in a vertical arbitrary time periodic electric field journal December 2017
From Electrodiffusion Theory to the Electrohydrodynamics of Leaky Dielectrics through the Weak Electrolyte Limit text January 2017
Controlled Nanoscale Electrohydrodynamic Patterning Using Mesopatterned Template journal August 2018