In this note, we present a set of radiowave dielectric spectroscopy measurements of two dilute, differently-charged polyelectrolyte solutions, under different solvent conditions. We have found that both the dielectric strength, As, and the relaxation time, Ti, of the dielectric relaxation process associated with the counterion polarization along a length scale of the order of the correlation length obey the scaling laws with the polyion concentration, according to the Ito model. This is verified with good accuracy independently of the quality of the solvent, which has been varied from poor to good solvent conditions. This finding supports evidence to the fact that, in dilute solutions, the counterion polarization is independent of the polyion concentration, in spite of what occurs at the semi-dilute concentrations.

Dielectric scaling in polyelectrolyte solutions with different solvent quality in the dilute concentration regime / Bordi, Federico; Cametti, Cesare; Sennato, Simona; S., Zuzzi; D., Dou; R. H., Colby. - In: PHYSICAL CHEMISTRY CHEMICAL PHYSICS. - ISSN 1463-9076. - 8:31(2006), pp. 3653-3658. [10.1039/b605624e]

Dielectric scaling in polyelectrolyte solutions with different solvent quality in the dilute concentration regime

BORDI, FEDERICO;CAMETTI, Cesare;SENNATO, Simona;
2006

Abstract

In this note, we present a set of radiowave dielectric spectroscopy measurements of two dilute, differently-charged polyelectrolyte solutions, under different solvent conditions. We have found that both the dielectric strength, As, and the relaxation time, Ti, of the dielectric relaxation process associated with the counterion polarization along a length scale of the order of the correlation length obey the scaling laws with the polyion concentration, according to the Ito model. This is verified with good accuracy independently of the quality of the solvent, which has been varied from poor to good solvent conditions. This finding supports evidence to the fact that, in dilute solutions, the counterion polarization is independent of the polyion concentration, in spite of what occurs at the semi-dilute concentrations.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/363568
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