Blob Size Controls Diffusion of Free Polymer in a Chemically Identical Brush in Semidilute Solution

[Image: see text] The diffusion of rhodamine-labeled poly(ethylene glycol) (r-PEG) within surface-grafted poly(ethylene glycol) (s-PEG) layers in aqueous solution at 18 °C was measured by fluorescence correlation spectroscopy. The diffusion coefficient of r-PEG within s-PEG was controlled by the gra...

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Autores principales: Zhang, Zhenyu J., Edmondson, Steve, Mears, Matthew, Madsen, Jeppe, Armes, Steven P., Leggett, Graham J., Geoghegan, Mark
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2018
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6117105/
https://www.ncbi.nlm.nih.gov/pubmed/30174342
http://dx.doi.org/10.1021/acs.macromol.8b01193
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author Zhang, Zhenyu J.
Edmondson, Steve
Mears, Matthew
Madsen, Jeppe
Armes, Steven P.
Leggett, Graham J.
Geoghegan, Mark
author_facet Zhang, Zhenyu J.
Edmondson, Steve
Mears, Matthew
Madsen, Jeppe
Armes, Steven P.
Leggett, Graham J.
Geoghegan, Mark
author_sort Zhang, Zhenyu J.
collection PubMed
description [Image: see text] The diffusion of rhodamine-labeled poly(ethylene glycol) (r-PEG) within surface-grafted poly(ethylene glycol) (s-PEG) layers in aqueous solution at 18 °C was measured by fluorescence correlation spectroscopy. The diffusion coefficient of r-PEG within s-PEG was controlled by the grafting density, σ, and scaled as σ(–1.42±0.09). It is proposed that a characteristic blob size associated with the grafted (brush) layer defines the region through which the r-PEG diffusion occurs. The diffusion coefficients for r-PEG in semidilute solution were found to be similar to those in the brushes.
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spelling pubmed-61171052018-08-31 Blob Size Controls Diffusion of Free Polymer in a Chemically Identical Brush in Semidilute Solution Zhang, Zhenyu J. Edmondson, Steve Mears, Matthew Madsen, Jeppe Armes, Steven P. Leggett, Graham J. Geoghegan, Mark Macromolecules [Image: see text] The diffusion of rhodamine-labeled poly(ethylene glycol) (r-PEG) within surface-grafted poly(ethylene glycol) (s-PEG) layers in aqueous solution at 18 °C was measured by fluorescence correlation spectroscopy. The diffusion coefficient of r-PEG within s-PEG was controlled by the grafting density, σ, and scaled as σ(–1.42±0.09). It is proposed that a characteristic blob size associated with the grafted (brush) layer defines the region through which the r-PEG diffusion occurs. The diffusion coefficients for r-PEG in semidilute solution were found to be similar to those in the brushes. American Chemical Society 2018-08-10 2018-08-28 /pmc/articles/PMC6117105/ /pubmed/30174342 http://dx.doi.org/10.1021/acs.macromol.8b01193 Text en Copyright © 2018 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
spellingShingle Zhang, Zhenyu J.
Edmondson, Steve
Mears, Matthew
Madsen, Jeppe
Armes, Steven P.
Leggett, Graham J.
Geoghegan, Mark
Blob Size Controls Diffusion of Free Polymer in a Chemically Identical Brush in Semidilute Solution
title Blob Size Controls Diffusion of Free Polymer in a Chemically Identical Brush in Semidilute Solution
title_full Blob Size Controls Diffusion of Free Polymer in a Chemically Identical Brush in Semidilute Solution
title_fullStr Blob Size Controls Diffusion of Free Polymer in a Chemically Identical Brush in Semidilute Solution
title_full_unstemmed Blob Size Controls Diffusion of Free Polymer in a Chemically Identical Brush in Semidilute Solution
title_short Blob Size Controls Diffusion of Free Polymer in a Chemically Identical Brush in Semidilute Solution
title_sort blob size controls diffusion of free polymer in a chemically identical brush in semidilute solution
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6117105/
https://www.ncbi.nlm.nih.gov/pubmed/30174342
http://dx.doi.org/10.1021/acs.macromol.8b01193
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