Second Harmonic Light Scattering from Spherical Polyelectrolyte Brushes

Peukert W, Schürer B, Hoffmann M, Wunderlich S, Peschel U, Harnau L, Ballauf M (2011)

Publication Language: English

Publication Type: Journal article

Publication year: 2011

Journal

Journal of Physical Chemistry C American Chemical Society

Book Volume: 115

Pages Range: 18302-18309

Journal Issue: 37

DOI: 10.1021/jp2064547

Abstract

Optical second harmonic generation (SHG) was applied to study the shell layer of spherical polyelectrolyte brushes (SPB) as a function of ionic strength. The particles consist of a polystyrene core from which linear chains of a quenched polyelectrolyte are grafted. Compared to all systems studied by SHG previously, the shell layer in this study has a remarkable thickness of ca. 100 nm. Angle-resolved second harmonic (SH) scattering profiles were recorded and compared to simulations with different model geometries using a nonlinear Mie scattering model. The analysis reveals that the second harmonic signal is not generated by the polyelectrolyte molecules, but rather by oriented and polarized water molecules at the inner (polystyrene / polyelectrolyte) and at the outer (polyelectrolyte / solvent) interface of the polyelectrolyte shell. The results demonstrate that angle-resolved SH light scattering provides direct access to the structure of water and the screening of charges at the inner and outer interface of the polyelectrolyte shell. Correspondingly, this work sets the experimental and theoretical basis for the study of the extended interfacial layer of electrosterically stabilized particles by SH light scattering.

Authors with CRIS profile

Wolfgang Peukert Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik Martin Hoffmann Technische Fakultät Sarina Wunderlich Professur für Experimentalphysik Ulf Peschel Professur für Experimentalphysik

Additional Organisation(s)

Exzellenz-Cluster Engineering of Advanced Materials

Involved external institutions

Max Planck Institute for Intelligent Systems (MPI-IS) / Max-Planck-Institut für Intelligente Systeme DE Germany (DE)

How to cite

APA:

Peukert, W., Schürer, B., Hoffmann, M., Wunderlich, S., Peschel, U., Harnau, L., & Ballauf, M. (2011). Second Harmonic Light Scattering from Spherical Polyelectrolyte Brushes. Journal of Physical Chemistry C, 115(37), 18302-18309. https://doi.org/10.1021/jp2064547

MLA:

Peukert, Wolfgang, et al. "Second Harmonic Light Scattering from Spherical Polyelectrolyte Brushes." Journal of Physical Chemistry C 115.37 (2011): 18302-18309.

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