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Main Title: Structure, Dynamics, and Composition of Large Clusters in Polyelectrolyte–Surfactant Systems
Author(s): Hoffmann, Ingo
Simon, Miriam
Bleuel, Markus
Falus, Peter
Gradzielski, Michael
Type: Article
Language Code: en
Abstract: Mixtures of oppositely charged polyelectrolyte (PE) and surfactant show rich structural behavior. The dynamics of such self-assembled structures can be quite complex. For example, using dynamic light scattering (DLS), we observed a slow collective relaxation mode for mixtures of the cationically charged PE JR 400 and the anionic surfactant SDS if the concentration of the system is sufficiently high and a small excess of PE charges is present. A similar mode is observed by using fluorescence correlation spectroscopy (FCS). However, a large quantitative discrepancy is observed between the values obtained from DLS and FCS. In this paper, we are investigating the connection between these slow relaxation modes and the formation of large micrometer sized structures which have been investigated using ultrasmall-angle neutron scattering (USANS), and the discrepancies between results from DLS and FCS are explained.
Issue Date: 15-Mar-2019
Date Available: 27-May-2020
DDC Class: 540 Chemie und zugeordnete Wissenschaften
Subject(s): transport properties
fluorescence spectroscopy
dynamic light scattering
cluster chemistry
Sponsor/Funder: BMBF, 05K13KT1, Probenumgebung und paralle Charakterisierung bei hochpräzisen Neutronen Spin-Echo (NSE) Messungen an komplexen Systemen der weichen Materie
Journal Title: Macromolecules
Publisher: American Chemical Society (ACS)
Publisher Place: Washington, DC
Volume: 52
Issue: 6
Publisher DOI: 10.1021/acs.macromol.8b02611
Page Start: 2607
Page End: 2615
EISSN: 1520-5835
ISSN: 0024-9297
Appears in Collections:FG Physikalische Chemie / Molekulare Materialwissenschaften » Publications

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