U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Spinodal Dewetting on Chemically Patterned Substrates

Published

Author(s)

A Sehgal, V Ferreiro, Jack F. Douglas, Eric J. Amis, Alamgir Karim

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

Sehgal, A. , Ferreiro, V. , Douglas, J. , Amis, E. and Karim, A. (2008), Spinodal Dewetting on Chemically Patterned Substrates, Physical Review Letters (Accessed April 19, 2024)

Created October 16, 2008