Phys. Rev. E 57, R6273–R6276 (1998)

Phase separation of ultrathin polymer-blend films on patterned substrates

Abstract

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A. Karim¹, J. F. Douglas^1,2, B. P. Lee^1,2, S. C. Glotzer^1,2, J. A. Rogers², R. J. Jackman³, E. J. Amis¹, and G. M. Whitesides³
¹Polymers Division, NIST, Gaithersburg, Maryland 20899
²Center for Theoretical and Computational Materials Science NIST, Gaithersburg, Maryland 20899
³Department of Chemistry and Department of Chemical Biology, Harvard University, Cambridge, Massachusetts 02138

Received 6 February 1998; published in the issue dated June 1998

The phase separation of ultrathin polymer-blend films of polystyrene and polybutadiene on microcontact printed alkanethiol patterns with hydrophobic and hydrophilic end groups (-CH₃ and -COOH) is investigated by atomic force microscopy. Simulations suggest that the phase-separation morphology can be controlled through patterns that modulate the polymer-surface interaction, and this concept is verified experimentally. Length scale pattern control is found to be limited to a scale on the order of a few micrometers.

URL:

http://link.aps.org/doi/10.1103/PhysRevE.57.R6273

DOI:

10.1103/PhysRevE.57.R6273

PACS:

61.41.+e, 64.75.+g, 68.55.Jk

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Phys. Rev. E 57, R6273–R6276 (1998)

Phase separation of ultrathin polymer-blend films on patterned substrates