Dynamics of interacting edge defects in copolymer lamellae

  • J. D. McGraw
  • I. D. W. Rowe
  • M. W. Matsen
  • K. Dalnoki-Veress
Regular Article


It is known that terraces at the air-polymer interface of lamella-forming diblock copolymers do not make discontinuous jumps in height. Despite the underlying discretized structure, the height profiles are smoothly varying. The width of a transition region of a terrace edge in isolation is typically several hundreds of nanometres, resulting from a balance between surface tension, chain stretching penalties, and the enthalpy of mixing. What is less well known in these systems is what happens when two transition regions interact with one another. In this study, we investigate the dynamics of the interactions between copolymer lamellar edges. We find that the data can be well described by a model that assumes a repulsion between adjacent edges. While the model is simplistic, and does not include molecular level details, its agreement with the data suggests that some of the the underlying assumptions provide insight into the complex interplay between defects.


Atomic Force Microscopy Diblock Copolymer Repulsive Interaction Free Interface Edge Tension 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • J. D. McGraw
    • 1
  • I. D. W. Rowe
    • 1
  • M. W. Matsen
    • 2
  • K. Dalnoki-Veress
    • 1
  1. 1.Department of Physics & Astronomy and the Brockhouse Institute for Materials ResearchMcMaster UniversityHamiltonCanada
  2. 2.School of Mathematical and Physical SciencesUniversity of ReadingWhiteknights, ReadingUK

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