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Polymer conformation in nanoscopic soft confinement

Kuttich, B. and Grillo, I. and Schottner, S. and Gallei, M. and Stühn, B. (2017):
Polymer conformation in nanoscopic soft confinement.
13, In: Soft Matter, The Royal Society of Chemistry, pp. 6709-6717, DOI: 10.1039/C7SM01179B,
[Online-Edition: http://dx.doi.org/10.1039/C7SM01179B],
[Article]

Abstract

We study the conformation of a polymer (polyethylene glycol) in a nanoscopic soft confinement with attractive walls. The polymer is added to a water-in-oil microemulsion based on the deuterated anionic surfactant AOT, d-octane and D2O. Three different droplet sizes and up to three polymers per droplet are investigated with small angle scattering combining X-rays and neutrons. This allows determining the confinement size and polymer conformation on identical samples. Whereas polymer conformation in bulk is found to be well described with the model of a Gaussian coil its radius of gyration is drastically increased in the droplet. At the same time it is compressed on a local scale. This supports the picture of a polymer strongly adsorbed on the surfactant layer with a thickness of several Angstroms.

Item Type: Article
Erschienen: 2017
Creators: Kuttich, B. and Grillo, I. and Schottner, S. and Gallei, M. and Stühn, B.
Title: Polymer conformation in nanoscopic soft confinement
Language: English
Abstract:

We study the conformation of a polymer (polyethylene glycol) in a nanoscopic soft confinement with attractive walls. The polymer is added to a water-in-oil microemulsion based on the deuterated anionic surfactant AOT, d-octane and D2O. Three different droplet sizes and up to three polymers per droplet are investigated with small angle scattering combining X-rays and neutrons. This allows determining the confinement size and polymer conformation on identical samples. Whereas polymer conformation in bulk is found to be well described with the model of a Gaussian coil its radius of gyration is drastically increased in the droplet. At the same time it is compressed on a local scale. This supports the picture of a polymer strongly adsorbed on the surfactant layer with a thickness of several Angstroms.

Journal or Publication Title: Soft Matter
Volume: 13
Publisher: The Royal Society of Chemistry
Divisions: 05 Department of Physics > Institute for condensed matter physics > Experimental Condensed Matter Physics
05 Department of Physics > Institute for condensed matter physics
05 Department of Physics
Date Deposited: 23 Nov 2017 08:58
DOI: 10.1039/C7SM01179B
Official URL: http://dx.doi.org/10.1039/C7SM01179B
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