Counterion condensation in pH-regulated polyelectrolytes

Title
Counterion condensation in pH-regulated polyelectrolytes
Author(s)
스즈첸Li-Hsien Yeh[Li-Hsien Yeh]Jyh-Ping Hsu[Jyh-Ping Hsu]Shiojenn Tseng[Shiojenn Tseng]
Keywords
ELECTROPHORETIC BEHAVIOR; CHARGE; ELECTROLYTE; PARTICLES; DNA
Issue Date
201206
Publisher
ELSEVIER SCIENCE INC
Citation
ELECTROCHEMISTRY COMMUNICATIONS, v.19, pp.97 - 100
Abstract
The effective charge of polyelectrolytes (PEs) plays an essential role in their electrokinetic behaviors and applications such as biosensors and drug delivery. To gain a better understanding of this crucial factor, we consider a charge-regulated PE, which simulates entities such as biomacromolecules and charged dendrimers, in a general electrolyte solution mimicking common experimental conditions. Taking account of the effects of pH and the presence of multiple ionic species, both the effective charge and the phenomenon of counterion condensation (CC) of a charge-regulated PE are investigated for the first time in a realistic manner. We show that the occurrence of CC, which significantly affects the charged property of the PE, depends highly upon those two effects. Our model is verified by the experimental data in the literature, which are unable to be described by the famous Manning theory for polyelectrolytes, and the results gathered provide both necessary theoretical foundation and valuable information for utilizing pH-tunable PEs in relevant applications. (C) 2012 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/28070http://dx.doi.org/10.1016/j.elecom.2012.03.009
ISSN
1388-2481
Appears in Collections:
공과대학 > 기계공학부 > Articles
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