Jump to main content
Jump to site search

Issue 11, 2014
Previous Article Next Article

Influence of internal viscoelastic modes on the Brownian motion of a λ-DNA coated colloid

Author affiliations

Abstract

We study the influence of grafted polymers on the diffusive behaviour of a colloidal particle. Our work demonstrates how such additional degrees of freedom influence the Brownian motion of the particle, focusing on internal viscoelastic coupling between the polymer and colloid. Specifically, we study the mean-squared displacements (MSDs) of λ-DNA grafted colloids using Brownian dynamics simulation. Our simulations reveal the non-trivial effect of internal modes, which gives rise to a crossover from the short-time viscoelastic to long-time diffusional behaviour. We also show that basic features can be captured by a simple theoretical model considering the relative motion of a colloid to a part of the polymer corona. This model describes well a MSD calculated from an extremely long trajectory of a single λ-DNA coated colloid from experiment and allows characterisation of the λ-DNA hairs. Our study suggests that the access to the internal relaxation modes via the colloid trajectory offers a novel method for the characterisation of soft attachments to a colloid.

Graphical abstract: Influence of internal viscoelastic modes on the Brownian motion of a λ-DNA coated colloid

Back to tab navigation

Publication details

The article was received on 08 Nov 2013, accepted on 10 Jan 2014 and first published on 13 Jan 2014


Article type: Paper
DOI: 10.1039/C3SM52830H
Citation: Soft Matter, 2014,10, 1738-1745
  • Open access: Creative Commons BY-NC license
  •   Request permissions

    Influence of internal viscoelastic modes on the Brownian motion of a λ-DNA coated colloid

    T. Yanagishima, N. Laohakunakorn, U. F. Keyser, E. Eiser and H. Tanaka, Soft Matter, 2014, 10, 1738
    DOI: 10.1039/C3SM52830H

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements