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Surface Evolution of Copolymer thin Films as Revealed by Atomic Force Microscopy

Published online by Cambridge University Press:  25 February 2011

G. Coulon ,
B. Collin ,
D. Chatenay  and
D. Ausserre
G. Coulon
Affiliation:
LPI2M2C, Université P.M.Curie and CNRS Institut Curie, Section de Physique et Chimle, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France
B. Collin
Affiliation:
LPI2M2C, Université P.M.Curie and CNRS Institut Curie, Section de Physique et Chimle, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France
D. Chatenay
Affiliation:
LPI2M2C, Université P.M.Curie and CNRS Institut Curie, Section de Physique et Chimle, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France
D. Ausserre
Affiliation:
LPI2M2C, Université P.M.Curie and CNRS Institut Curie, Section de Physique et Chimle, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France
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Abstract

Atomic Force Microscopy has been used to study the early stage evolution of the free surface of annealed symmetric poly(styrene-b-n-butylmethacrylate) diblock copolymer thin films. As the lamellar ordering propagates through the film thickness, Islands or holes are formed on the free surface. It Is shown that, depending on the Initial film thickness, I.e. on the fraction of the film surface occupied by the islands (or holes) In the ordered state, the existence or non-existence of spatial correlations characterizes the ordering kinetics of both islands and holes. However, the limit between these two regimes is not the same in the two cases : in the case of holes, spatial correlations occur for a higher value of the surface coverage than In the case of islands.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 248: Symposium O – Complex Fluids , 1991 , 389
Copyright
Copyright © Materials Research Society 1992

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References

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