Response of a Permanently Charged Polyelectrolyte Brush to External Ions: The Aspects of Structure and Dynamics

Langmuir : the ACS Journal of Surfaces and Colloids
Bintao ZhaoJiang Zhao

Abstract

Structure and dynamics inside permanently charged polyelectrolyte brushes, sodium polystyrene sulfonate brushes, during their response to the introduction of external ions (NaCl) are investigated by neutron reflectivity and dielectric spectroscopy. Neutron reflectivity measurements show that the segmental density of the inner part of the brushes decreases and that of the outer part increases when the salt level is tuned from the salt-free condition to a moderate level (<10-2 M)-the brushes swell further compared with the salt-free condition. This is attributed to the breakup of the multiplets formed by dipole-dipole pairs, and by this process, the previously constrained chain segments by the multiplets are released. Dielectric spectroscopy discovers a giant dipole by the charge separation of the adsorbed counterions and the PSS- chains, induced by electric field. The dynamics of the induced giant dipole is accelerated with the increase of external salt, as a result of the charge regularization by elevated salt level. At high-enough salt level, the screening effect reduces the electrostatic repulsion between the neighboring chains and makes the brushes shrink.

References

Oct 9, 1995·Physical Review Letters·Y MirL Auvray
Jul 18, 2001·Journal of the American Chemical Society·Y Tran, P Auroy
Sep 12, 2003·Nature·Uri RavivJacob Klein
Jul 23, 2004·The Journal of Chemical Physics·M BiesalskiJ Rühe
Jul 23, 2004·The Journal of Chemical Physics·M Muthukumar
Jul 13, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Vivek M PrabhuHiroshi Ito
Jan 7, 2009·The Journal of Chemical Physics·Shengqin WangJiang Zhao
Nov 6, 2010·Macromolecules·Arindam Kundagrami, M Muthukumar
Mar 19, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Mauro MoglianettiSimon Titmuss
Jul 29, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Michael P WeirRichard A L Jones
Feb 2, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Iain E DunlopJacob Klein
Mar 3, 2012·The Journal of Chemical Physics·Pengxiang JiaJiang Zhao
Jul 12, 2012·The Journal of Chemical Physics·Rajeev KumarS Michael Kilbey
Nov 21, 2012·Chemical Communications : Chem Comm·Surjith KumarYue Zhao
Jan 26, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Yu-Fan HoPai-Yi Hsiao
Apr 10, 2014·ACS Applied Materials & Interfaces·Sergey ChernyyJoseph Iruthayaraj
Aug 19, 2014·Journal of the American Chemical Society·Casey J GalvinJan Genzer
Sep 3, 2014·Journal of Biomaterials Science. Polymer Edition·Motoyasu KobayashiAtsushi Takahara
Mar 15, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Joshua D WillottGrant B Webber
Jul 15, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Haiyan Wu, Kongshuang Zhao
Nov 17, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·Marc ThomasNils Hartmann
Jan 12, 2016·ACS Applied Materials & Interfaces·Asghar Dolatkhah, Lee D Wilson
Apr 12, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Golrokh HeydariPer Martin Claesson
Oct 30, 2016·Proceedings of the National Academy of Sciences of the United States of America·Murugappan Muthukumar
Feb 17, 2017·The Journal of Chemical Physics·Rajeev KumarAlexei P Sokolov
Jul 25, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Yuji HigakiAtsushi Takahara

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Citations

May 4, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Chunda JiJiang Zhao
Feb 7, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Ting ChenJinben Wang
Mar 23, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Mihaela Delcea, Christiane A Helm

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