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Pattern Formation in Thin Polymer Films: A New Morphology

Published online by Cambridge University Press:  01 February 2011

Jean-Loup Masson  and
Peter F. Green
Jean-Loup Masson
Affiliation:
Department of Chemical Engineering andTexas Materials Institute, The University of Texas at Austin, Austin, TX
Peter F. Green
Affiliation:
Department of Chemical Engineering andTexas Materials Institute, The University of Texas at Austin, Austin, TX
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Abstract

Researchers have shown that thin, nonwetting, liquid homopolymer films dewet substrates, forming patterns that reflect fluctuations in the local film thickness. These patterns have been shown to be either discrete cylindrical holes or bicontinuous “spinodal-like” patterns. In this paper we show the existence of a new morphology. During the early stage of dewetting, discrete highly asymmetric holes appear spontaneously throughout the film. The nucleation rate of these holes is faster than their growth rate. The morphology of the late stage of evolution, after 18 days, is characterized by a bicontinuous pattern, distinct form conventional spinodal dewetting patterns. This morphology has been observed for a range of film thicknesses between 7.5 and 21nm. The structural evolution of this intermediate morphology is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 629: Symposium FF – Interfaces, Adhesion and Processing in Polymer Systems , 2000 , FF1.2
Copyright
Copyright © Materials Research Society 2000

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References

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