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 26, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created October 16, 2008