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Embedded Microstructures by Electric-Field-Induced Pattern Formation in Interacting Thin Layers

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Department of Chemical Engineering, Indian Institute of Technology, Kanpur, India
Department of Chemical Engineering, Indian Institute of Technology, Guwahati, India
§ School of Mechanical Engineering, Yeungnam University, Gyongsan, South Korea
*Author to whom correspondences should be addressed. Tel: +91-512-259 7026. Fax: +91-512-259 0104. E-mail: [email protected]
∥Present address: School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853-5201.
Cite this: Langmuir 2010, 26, 13, 10943–10952
Publication Date (Web):May 18, 2010
https://doi.org/10.1021/la100968p
Copyright © 2010 American Chemical Society

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    Abstract

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    Electric-field-induced interfacial instabilities and pattern formation in a pair of interacting thin films are analyzed on the basis of linear stability analysis and long-wave nonlinear simulations. The films are coated onto two parallel plate electrodes and separated by an air gap between them. A linear stability analysis (LSA) is carried out for viscoelastic films to show that the ratios of material properties to films thickness control the length scale and timescale significantly and the presence of the second layer increases the overall capacitance and thus can lead to a smaller length scale as compared to the instability in a single film. Long-wave nonlinear analysis for interacting viscous layers indicates that the instabilities are always initiated by the antiphase squeezing rather than the in-phase bending mode of deformation at the interfaces. Nonlinear simulations on patterned electrodes show that this novel geometry for electric field patterning can be employed to generate intricate, embedded 3-D periodic patterns and to miniaturize patterns. Simulations are presented for e-molding of a number of periodic self-organized patterns such as pincushion structures, straight/corrugated embedded microchannels, and microbubbles. A few interesting examples are also shown where (1) the pathway of evolution changes without altering the equilibrium morphology when kinetic parameters such as viscous forces are changed and (2) the self-organized equilibrium morphology does not reproduce the underlying patterns on the electrodes.

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    Cited By

    This article is cited by 14 publications.

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    3. Mohar Dey, Dipankar Bandyopadhyay, Ashutosh Sharma, Shizhi Qian, and Sang Woo Joo . Charge Leakage Mediated Pattern Miniaturization in the Electric Field Induced Instabilities of an Elastic Membrane. Industrial & Engineering Chemistry Research 2014, 53 (49) , 18840-18851. https://doi.org/10.1021/ie500378k
    4. Qingzhen Yang, Ben Q. Li, Yucheng Ding, and Jinyou Shao . Steady State of Electrohydrodynamic Patterning of Micro/Nanostructures on Thin Polymer Films. Industrial & Engineering Chemistry Research 2014, 53 (32) , 12720-12728. https://doi.org/10.1021/ie502288a
    5. P. Dinesh Sankar Reddy, Dipankar Bandyopadhyay, and Ashutosh Sharma . Electric-Field-Induced Instabilities in Thin Liquid Trilayers Confined between Patterned Electrodes. The Journal of Physical Chemistry C 2012, 116 (43) , 22847-22858. https://doi.org/10.1021/jp3058228
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    7. Lin Xu, Huanhuan Zhang, Lina Wang, Yuyuan Lu, Lijia An, Tongfei Shi. Fabrication of complex polymer nanostructures from thin polymer blend films. Polymer 2019, 171 , 115-120. https://doi.org/10.1016/j.polymer.2019.03.009
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    10. Miklós Vécsei, Mathias Dietzel, Steffen Hardt. Coupled self-organization: Thermal interaction between two liquid films undergoing long-wavelength instabilities. Physical Review E 2014, 89 (5) https://doi.org/10.1103/PhysRevE.89.053018
    11. Kartick Mondal, Prashant Kumar, Dipankar Bandyopadhyay. Electric field induced instabilities of thin leaky bilayers: Pathways to unique morphologies and miniaturization. The Journal of Chemical Physics 2013, 138 (2) https://doi.org/10.1063/1.4773857
    12. Mohar Dey, Dipankar Bandyopadhyay, Ashutosh Sharma, Shizhi Qian, Sang Woo Joo. Electric-field-induced interfacial instabilities of a soft elastic membrane confined between viscous layers. Physical Review E 2012, 86 (4) https://doi.org/10.1103/PhysRevE.86.041602
    13. George Amarandei, Philippe Beltrame, Ian Clancy, Colm O'Dwyer, Arousian Arshak, Ullrich Steiner, David Corcoran, Uwe Thiele. Pattern formation induced by an electric field in a polymer–air–polymer thin film system. Soft Matter 2012, 8 (23) , 6333. https://doi.org/10.1039/c2sm25273b
    14. Ankur Verma, Ashutosh Sharma, Giridhar U. Kulkarni. Ultrafast Large‐Area Micropattern Generation in Nonabsorbing Polymer Thin Films by Pulsed Laser Diffraction. Small 2011, 7 (6) , 758-765. https://doi.org/10.1002/smll.201001939

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