Sehgal, A.
, Ferreiro, V.
, Douglas, J.
, Amis, E.
and Karim, A.
(2008),
Spinodal Dewetting on Chemically Patterned Substrates, Physical Review Letters
(Accessed September 18, 2025)
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Spinodal Dewetting on Chemically Patterned Substrates
Published
Author(s)
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Abstract
We utilize chemically patterned substrates with arrays of progressively narrower stripes (1-15 mm) to investigate the influence of pattern size on the morphology of dewetting polystyrene films. The early-stage dewetting patterns align with the substrate patterns, leading to the formation of correlated droplet arrays. The droplets become anisotropic after they coarsen to a scale comparable to the stripe width, and then undergo a morphological transition to circular shaped droplets that cross multiple stripes. This leads to quantization of droplet size and contact-angle.Citation
Physical Review Letters
Pub Type
Journals
Keywords
anisotropic spinodal dewetting, atomic force microscopy, contact angles, high-throughput, morphological transitions, polymer thin-films, self-assembled monolayers
Citation
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Created October 16, 2008