Self-Organized Microstructures in Thin Bilayers on Chemically Patterned Substrates

Title
Self-Organized Microstructures in Thin Bilayers on Chemically Patterned Substrates
Author(s)
아슈샬마Dipankar Bandyopadhy[Dipankar Bandyopadhy]
Keywords
2-LAYERED LIQUID-FILM; NONLINEAR STABILITY ANALYSIS; SOFT ELASTOMERIC LAYERS; POLYMER-FILMS; ELECTRIC-FIELD; LIQUID/LIQUID INTERFACES; FLUORESCENT POLYMER; DEWETTING PATHWAYS; ORDERED PATTERNS; FLUID FILMS
Issue Date
201002
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v.114, no.5, pp.2237 - 2247
Abstract
A long-wave nonlinear analysis of the instabilities engendered by van der Waals forces in a thin (< 100 nm) viscous bilayer resting on a chemically heterogeneous Patterned substrate is presented. Dewetting behavior of thin bilayers is correlated to the macroscopic wetting properties of the two fluids. The chemical potential gradients created by the microdomains of differing wettability can lead to a variety of ordered patterns in an unstable dewetting bilayer. For example, periodic stripes and checkerboard chemical patterns can engender interesting ordered morphologies such as arrays of open or closed channels, membranes with ordered porosity, and embedded or encapsulated microdroplets. We also show that thin bilayers can also be used as a tool for (i) transfer or replication of ordered patterns from the interface of the buried lower layer to the more accessible free surface of the upper layer and (ii) generation of micromolds for patterning applications.
URI
http://hdl.handle.net/YU.REPOSITORY/22947http://dx.doi.org/10.1021/jp909759u
ISSN
1932-7447
Appears in Collections:
공과대학 > 기계공학부 > Articles
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