Dynamics and structure of biopolyelectrolytes in repulsion regime characterized by dielectric spectroscopy

作者：Tomic S^*; Grgicin D; Ivek T; Vuletic T; Babic S Dolanski; Podgornik R

来源：Physica B: Condensed Matter , 2012, 407(11): 1958-1963.

DOI：10.1016/j.physb.2012.01.074

• Biopolyelectrolyte
• Dielectric response
• Dynamics and conformation
• Univalent counterion

We overview the study of biopolyelectrolytes by dielectric spectroscopy technique by primarily focusing on the case of repulsive regime of intersegment interactions mediated by univalent counterions. Two observed dielectric relaxations in 100 Hz-100 MHz frequency range due to diffusive motion of counterions are related to polyelectrolyte structural properties: the high frequency mode probes the structural organization of the polyion network in solution, while the low frequency mode is correlated with single polyion conformational properties. Open issues are highlighted and prospects for further research with polyvalent counterions are designated in order to study the crossover from repulsive to attractive regime of intersegment interactions.

• 出版日期2012-6-1