Kuttich, B. ; Grillo, I. ; Schottner, S. ; Gallei, M. ; Stühn, B. (2017):
Polymer conformation in nanoscopic soft confinement.
In: Soft Matter, 13, pp. 6709-6717. The Royal Society of Chemistry, DOI: 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. ; Grillo, I. ; Schottner, S. ; Gallei, M. ; 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 of the journal: | 13 |
| Publisher: | The Royal Society of Chemistry |
| Divisions: | 05 Department of Physics > Institute for condensed matter physics (2021 merged in Institute for Condensed Matter Physics) > Experimental Condensed Matter Physics 05 Department of Physics > Institute for condensed matter physics (2021 merged in Institute for Condensed Matter Physics) 05 Department of Physics |
| Date Deposited: | 23 Nov 2017 08:58 |
| DOI: | 10.1039/C7SM01179B |
| URL / URN: | http://dx.doi.org/10.1039/C7SM01179B |
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