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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|
|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|