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Diffusion of a polymer ‘pancake’

Author

Listed:
  • Svetlana A. Sukhishvili

    (University of Illinois)

  • Yan Chen

    (Laboratory for Fluorescence Dynamics, University of Illinois)

  • Joachim D. Müller

    (Laboratory for Fluorescence Dynamics, University of Illinois)

  • Enrico Gratton

    (Laboratory for Fluorescence Dynamics, University of Illinois)

  • Kenneth S. Schweizer

    (University of Illinois)

  • Steve Granick

    (University of Illinois)

Abstract

Thread-like chains of flexible polymers that adsorb to a solid surface assume a flat ‘pancake’ conformation1 when the surface coverage is low and are only able to diffuse in two dimensions because so many segments are adsorbed. Here we show that the centre-of-mass diffusion coefficient of the polymer chain, measured at dilute coverage to ensure minimal chain–chain interaction, has a strong power-law dependence on the degree of polymerization. This nonlinear dependence of polymer diffusion on a solid surface contrasts with the linear dependence observed on a fluid membrane2.

Suggested Citation

  • Svetlana A. Sukhishvili & Yan Chen & Joachim D. Müller & Enrico Gratton & Kenneth S. Schweizer & Steve Granick, 2000. "Diffusion of a polymer ‘pancake’," Nature, Nature, vol. 406(6792), pages 146-146, July.
    • Handle: RePEc:nat:nature:v:406:y:2000:i:6792:d:10.1038_35018166
    DOI: 10.1038/35018166
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