High elongation of polyelectrolyte chains in the osmotic limit of spherical polyelectrolyte brushes :  A study by cryogenic transmission electron microscopy

Kurzanzeige
dc.contributor.authorWittemann, Alexander
dc.contributor.authorDrechsler, Markusdeu
dc.contributor.authorTalmon, Yeshayahudeu
dc.contributor.authorBallauff, Matthiasdeu
dc.date.accessioned2012-08-23T07:55:33Zdeu
dc.date.available2012-08-23T07:55:33Zdeu
dc.date.issued2005-07-13
dc.description.abstractWe investigate the conformation of long polyelectrolyte chains attached to colloidal latex particles by cryogenic transmission electron microscopy (cryo-TEM). The dense grafting of the polyelectrolyte chains (“polyelectrolyte brush”) leads to a confinement of the counterions and a concomitantly high osmotic pressure within the polyelectrolyte layer attached to the core particles. Cryo-TEM has provided first model-independent direct proof for the strong stretching of the polyelectrolyte chains by direct visualization. If salt is added, cryo-TEM clearly shows how chains collapse because of the strong screening of the electrostatic interaction. Moreover, the analysis of interacting particles by cryo-TEM shows that the polyelectrolyte chains retract at close contact. Hence, we demonstrate how cryo-TEM can be used to analyze directly the spatial structure of polyelectrolyte brushes in situ.eng
dc.description.versionpublished
dc.identifier.citationPubl. in: Journal of the American Chemical Society ; 127 (2005), 27. - pp. 9688–9689deu
dc.identifier.doi10.1021/ja0513234deu
dc.identifier.pmid15998064
dc.identifier.urihttp://kops.uni-konstanz.de/handle/123456789/20205
dc.language.isoengdeu
dc.legacy.dateIssued2012-08-23deu
dc.rightsterms-of-usedeu
dc.rights.urihttps://rightsstatements.org/page/InC/1.0/deu
dc.subject.ddc540deu
dc.titleHigh elongation of polyelectrolyte chains in the osmotic limit of spherical polyelectrolyte brushes :  A study by cryogenic transmission electron microscopyeng
dc.typeJOURNAL_ARTICLEdeu
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@article{Wittemann2005-07-13elong-20205,
  year={2005},
  doi={10.1021/ja0513234},
  title={High elongation of polyelectrolyte chains in the osmotic limit of spherical polyelectrolyte brushes :  A study by cryogenic transmission electron microscopy},
  number={27},
  volume={127},
  issn={0002-7863},
  journal={Journal of the American Chemical Society},
  pages={9688--9689},
  author={Wittemann, Alexander and Drechsler, Markus and Talmon, Yeshayahu and Ballauff, Matthias}
}
kops.citation.iso690WITTEMANN, Alexander, Markus DRECHSLER, Yeshayahu TALMON, Matthias BALLAUFF, 2005. High elongation of polyelectrolyte chains in the osmotic limit of spherical polyelectrolyte brushes :  A study by cryogenic transmission electron microscopy. In: Journal of the American Chemical Society. 2005, 127(27), pp. 9688-9689. ISSN 0002-7863. Available under: doi: 10.1021/ja0513234deu
kops.citation.iso690WITTEMANN, Alexander, Markus DRECHSLER, Yeshayahu TALMON, Matthias BALLAUFF, 2005. High elongation of polyelectrolyte chains in the osmotic limit of spherical polyelectrolyte brushes :  A study by cryogenic transmission electron microscopy. In: Journal of the American Chemical Society. 2005, 127(27), pp. 9688-9689. ISSN 0002-7863. Available under: doi: 10.1021/ja0513234eng
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    <dcterms:abstract xml:lang="eng">We investigate the conformation of long polyelectrolyte chains attached to colloidal latex particles by cryogenic transmission electron microscopy (cryo-TEM). The dense grafting of the polyelectrolyte chains (“polyelectrolyte brush”) leads to a confinement of the counterions and a concomitantly high osmotic pressure within the polyelectrolyte layer attached to the core particles. Cryo-TEM has provided first model-independent direct proof for the strong stretching of the polyelectrolyte chains by direct visualization. If salt is added, cryo-TEM clearly shows how chains collapse because of the strong screening of the electrostatic interaction. Moreover, the analysis of interacting particles by cryo-TEM shows that the polyelectrolyte chains retract at close contact. Hence, we demonstrate how cryo-TEM can be used to analyze directly the spatial structure of polyelectrolyte brushes in situ.</dcterms:abstract>
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kops.sourcefieldJournal of the American Chemical Society. 2005, <b>127</b>(27), pp. 9688-9689. ISSN 0002-7863. Available under: doi: 10.1021/ja0513234deu
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kops.sourcefield.plainJournal of the American Chemical Society. 2005, 127(27), pp. 9688-9689. ISSN 0002-7863. Available under: doi: 10.1021/ja0513234eng
kops.submitter.emailregina.fleischmann@uni-konstanz.dedeu
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