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Publication Citation: Spinodal Dewetting on Chemically Patterned Substrates

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Author(s): A Sehgal; V Ferreiro; Jack F. Douglas; Eric J. Amis; Alamgir Karim;
Title: Spinodal Dewetting on Chemically Patterned Substrates
Published: Date Unknown
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
Keywords: anisotropic spinodal dewetting;atomic force microscopy;contact angles;high-throughput;morphological transitions;polymer thin-films;self-assembled monolayers
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