Skip to main content
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.

Combinatoral Study of Surface Pattern Formation in Thin Block Copolymer Films



A P. Smith, Jack F. Douglas, Alamgir Karim, J C. Meredith, Eric J. Amis


We investigate surface patterns in thin block copolymer films with a gradient in thickness, h. The usual hole and island morphologies are found when h varies from integral multiples m of the bulk lamellar thickness Lo but spinodal-like hole and island patterns are found near certain critical film thicknesses. Smooth films are found for a molecular mass (M) dependent h range centered about h (m + )Lo. The average size of bicontinuous patterns (lambda) scale as an inverse power of Lo, lambda Lo^(-2.5) and this effect is suggested to arise from a strong increase in the film surface viscosity with M.
Physical Review Letters
No. 1


combinatorial, diblock copolymers, polymer thin films


Smith, A. , Douglas, J. , Karim, A. , Meredith, J. and Amis, E. (2001), Combinatoral Study of Surface Pattern Formation in Thin Block Copolymer Films, Physical Review Letters, [online], (Accessed July 14, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created June 30, 2001, Updated October 12, 2021