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

Title
Embedded Microstructures by Electric-Field-Induced Pattern Formation in Interacting Thin Layers
Author(s)
아슈샬마Samanvaya Srivastava[Samanvaya Srivastava]Dipankar Bandyopadhy[Dipankar Bandyopadhy]
Keywords
LIQUID-LIQUID BILAYER; SOFT ELASTIC FILMS; POLYMER-FILMS; ELECTROHYDRODYNAMIC INSTABILITIES; LINEAR-STABILITY; SURFACE; RUPTURE; MORPHOLOGY; INTERFACE; ALIGNMENT
Issue Date
201005
Publisher
AMER CHEMICAL SOC
Citation
LANGMUIR, v.26, no.13, pp.10943 - 10952
Abstract
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 CM 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
URI
http://hdl.handle.net/YU.REPOSITORY/22447http://dx.doi.org/10.1021/la100968p
ISSN
0743-7463
Appears in Collections:
공과대학 > 기계공학부 > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE