Sodium polyacrylate (NaPA) in dilute aqueous solution at an ionic strength of [NaNO3] = 0.01M establishes a rich phase behavior in the presence of low amounts of silver cations, which were introduced at a few millimoles or less by replacing the corresponding amount of Na+ cations. Beyond an extremely low level of Ag+ cations, anionic PA chains aggregate. By increasing the concentration of Ag+, the aggregates become denser and keep on growing without limit. Once a certain range of [Ag+] is reached, the instantaneously formed dense aggregates remain stable. Irradiation of the PA aggregate solutions with UV-light induces formation of silver nanoparticles (Ag-Nps). Based on a combination of UV-vis spectroscopy, light scattering, transmission electron microscopy, and small angle neutron scattering, the mechanism of this NaPA assisted formation of Ag-Nps is studied. One focus of the study is lying on the effect of the two different solution states of dense aggregates, corresponding to the unstable growing AgPA aggregates and to the stable AgPA aggregates and another focus is aiming at the characterisation of the morphology of the generated hybrid particles composed of Ag-Nps and hosting PA chains.
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28 October 2018
Research Article|
July 17 2018
Polyacrylates in the presence of an extraordinary monovalent cation—Solution behavior and metal nanoparticle formation
Special Collection:
Chemical Physics of Charged Macromolecules
Anna Urbanski
;
Anna Urbanski
a)
1
Physikalische Chemie, Universität Paderborn
, 33098 Paderborn, Germany
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Markus Hansch;
Markus Hansch
1
Physikalische Chemie, Universität Paderborn
, 33098 Paderborn, Germany
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Carlos G. Lopez
;
Carlos G. Lopez
b)
1
Physikalische Chemie, Universität Paderborn
, 33098 Paderborn, Germany
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Ralf Schweins;
Ralf Schweins
2
Institut Laue-Langevin
, DS/LSS, 71 Avenue des Martyrs, CS 20 156, F-38042 Grenoble Cedex 9, France
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Yvonne Hertle;
Yvonne Hertle
3
Physikalische und Biophysikalische Chemie, Universität Bielefeld
, 33615 Bielefeld, Germany
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Thomas Hellweg
;
Thomas Hellweg
3
Physikalische und Biophysikalische Chemie, Universität Bielefeld
, 33615 Bielefeld, Germany
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Frank Polzer;
Frank Polzer
c)
4
Department of Physics, Humboldt-Universität zu Berlin
, 10099 Berlin, Germany
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Klaus Huber
Klaus Huber
d)
1
Physikalische Chemie, Universität Paderborn
, 33098 Paderborn, Germany
d)Author to whom correspondence should be addressed: klaus.huber@upb.de
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a)
Present address: Leibniz-Institut für Polymerforschung Dresden e.V., Institute of Physical Chemistry and Polymer Physics, 01069 Dresden, Germany.
b)
Present address: Institute of Physical Chemistry, RWTH Aachen University, Landoltweg 2, D–52056 Aachen, Germany.
c)
Present address: Celanese Services Germany GmbH, 65929 Frankfurt am Main, Germany.
d)Author to whom correspondence should be addressed: klaus.huber@upb.de
J. Chem. Phys. 149, 163318 (2018)
Article history
Received:
March 08 2018
Accepted:
May 28 2018
Citation
Anna Urbanski, Markus Hansch, Carlos G. Lopez, Ralf Schweins, Yvonne Hertle, Thomas Hellweg, Frank Polzer, Klaus Huber; Polyacrylates in the presence of an extraordinary monovalent cation—Solution behavior and metal nanoparticle formation. J. Chem. Phys. 28 October 2018; 149 (16): 163318. https://doi.org/10.1063/1.5028182
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