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Dielectric Relaxation in Biological SystemsPhysical Principles, Methods, and Applications$
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Valerica Raicu and Yuri Feldman

Print publication date: 2015

Print ISBN-13: 9780199686513

Published to Oxford Scholarship Online: August 2015

DOI: 10.1093/acprof:oso/9780199686513.001.0001

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Dielectric Properties of Polyelectrolytes and Lipid Vesicles

Dielectric Properties of Polyelectrolytes and Lipid Vesicles

(p.307) 3.5 Dielectric Properties of Polyelectrolytes and Lipid Vesicles
Dielectric Relaxation in Biological Systems

Federico Bordi

Stefano Sarti

Oxford University Press

This chapter aims to demonstrate the application of dielectric spectroscopy to aqueous polyelectrolyte solutions and to mixed polyelectrolyte–colloid solutions, showing what kind of information, at a molecular level, can be obtained by this technique on the peculiar behavior of these systems. Particular attention is devoted to the study of the interaction of polyelectrolytes with oppositely charged colloidal particles, and particularly lipid vesicles (liposomes) due to the increasing importance of these systems for different applications, especially in medical biotechnologies. After a brief description of polyelectrolytes and liposomes, we describe how dielectric spectroscopy can be used in the study of the physical properties of polyelectrolytes in aqueous solutions. To show the potential of the technique, we briefly review two examples of the use of dielectric spectroscopy in the study of mesoscopic polyelectrolyte–liposome aggregates.

Keywords:   polyelectrolytes, colloids, liposomes, polyelectrolyte–liposome aggregates, drug delivery, medical biotechnologies, mesoscopic aggregates, self-assembly

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