Unfolding Collapsed Polyelectrolytes in Alternating-Current Electric Fields
作者： Pai-Yi Hsiao , Yu-Fu Wei , Hsueh-Chia Chang
DOI: 10.1039/C0SM00848F
关键词: Polyelectrolyte 、 Condensed matter physics 、 Dissociation (chemistry) 、 Alternating current 、 Chemical physics 、 Dipole 、 Field strength 、 Counterion 、 Relaxation (NMR) 、 Electric field 、 Chemistry
摘要: We investigate the unfolding of single polyelectrolyte (PE) chains collapsed by trivalent salt under action alternating-current (AC) electric fields through computer simulations and theoretical scaling. The results show that a chain can be unfolded an AC field when strength exceeds direct-current (DC) threshold frequency is below critical value, corresponding to inverse charge relaxation/dissociation time condensed counterions at interface electrolyte. This relaxation also shown identical DC fluctuation time, suggesting dissociation polyvalent counterion on PE controls dipole formation dynamics field.
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