Diffusion of a polymer ‘pancake’

Svetlana A. Sukhishvili, Yan Chen, Joachim D. Müller, Enrico Gratton, Kenneth S. Schweizer and Steve Granick
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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

Nature, 2000, vol. 406, issue 6792, 146-146

Abstract: 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.

Date: 2000
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DOI: 10.1038/35018166

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