Local Confinement Controls Diffusive Nanoparticle Dynamics in Semidilute Polyelectrolyte Solutions

Langmuir : the ACS Journal of Surfaces and Colloids
Ali H SlimJacinta C Conrad

Abstract

We investigate the mobility of polystyrene particles ranging from 100 to 790 nm in diameter in dilute and semidilute sodium polystyrene sulfonate (NaPSS) solutions using fluorescence microscopy. We tune the polymer conformations by varying the ionic strength of the solution. The nanoparticle mean-squared displacements evolve linearly with time at all time scales, indicating Fickian diffusive dynamics. In solutions of high ionic strength, chains adopt a random walk conformation and particle dynamics couple to the bulk zero-shear rate viscosity, according to the Stokes-Einstein picture. In solutions of low ionic strength, however, particle dynamics nonmonotonically deviate from bulk predictions as polymer concentration increases and are not accurately predicted by the available models. These nonmonotonic dynamics directly correlate with the non-Gaussianity in distributions of particle displacements, suggesting the emergence of a local confining length scale as polyelectrolyte concentration increases.

References

Oct 21, 2003·Nature Materials·Michael E MackayCraig J Hawker
Jun 1, 2004·Physical Review Letters·I Y WongD A Weitz
Nov 4, 2005·Nature Materials·Takashi KashiwagiJohn R Shields
Apr 3, 2007·Nano Letters·Anish TutejaMichael S Wong
Jun 4, 2008·Physical Review Letters·Victor Pryamitsyn, Venkat Ganesan
Jul 26, 2008·Nature Nanotechnology·Dan PeerRobert Langer
Aug 12, 2009·Proceedings of the National Academy of Sciences of the United States of America·Bo WangSteve Granick
Nov 8, 2011·Macromolecules·Li-Heng CaiMichael Rubinstein
May 23, 2012·Nature Materials·Bo WangSteve Granick
Sep 26, 2012·Physical Review Letters·Hongyu GuoRobert L Leheny
Apr 1, 2014·Physical Review Letters·Jagannathan T KalathiSanat K Kumar
Oct 16, 2014·Proceedings of the National Academy of Sciences of the United States of America·Li TangJianjun Cheng
Feb 14, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·J Clara-RaholaEric R Weeks
Feb 19, 2015·Macromolecules·Li-Heng CaiMichael Rubinstein
Jan 20, 2016·The Journal of Physical Chemistry Letters·Chundong XueGuoqing Hu
Jan 16, 2017·Biophysical Journal·Thomas J LampoAndrew J Spakowitz
Oct 17, 2007·Journal of Physics. Condensed Matter : an Institute of Physics Journal·F Bresme, M Oettel
May 24, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Kavindya K Senanayake, Ashis Mukhopadhyay
Sep 5, 2019·Soft Matter·Kavindya K SenanayakeAshis Mukhopadhyay

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Citations

Feb 20, 2021·Physical Review Letters·Di Jia, Murugappan Muthukumar

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