Electrokinetics of pH-regulated zwitterionic polyelectrolyte nanoparticles

Title
Electrokinetics of pH-regulated zwitterionic polyelectrolyte nanoparticles
Author(s)
스즈첸Li-Hsien Yeh[Li-Hsien Yeh]Yi-Hsuan Tai[Yi-Hsuan Tai]Nan Wang[Nan Wang]Jyh-Ping Hsu[Jyh-Ping Hsu]
Keywords
NARROW CYLINDRICAL PORE; SOFT PARTICLES; COUNTERION CONDENSATION; ELECTROPHORETIC MOBILITY; CAPILLARY-ELECTROPHORESIS; SPHERICAL-PARTICLE; DNA TRANSLOCATION; IONIC TRANSPORT; BACTERIAL-CELLS; POLARIZATION
Issue Date
201212
Publisher
ROYAL SOC CHEMISTRY
Citation
NANOSCALE, v.4, no.23, pp.7575 - 7584
Abstract
The electrokinetic behavior of pH-regulated, zwitterionic polyelectrolyte (PE) nanoparticles (NPs) in a general electrolyte solution containing multiple ionic species is investigated for the first time. The NPs considered are capable of simulating entities such as proteins, biomolecules, and synthetic polymers. The applicability of the model proposed is verified by the experimental data of succinoglycan nanoparticles available in the literature. We show that, in addition to their effective charge density, counterion condensation, double-layer polarization, and electro-osmotic flow of unbalanced counterions inside the double layer all significantly affect the electrophoretic behaviors of NPs. Our model successfully predicts many interesting electrophoretic behaviors, which qualitatively agree with experimental observations available in the literature. In contrast, because the effects of double-layer polarization and charge regulation are neglected, the existing theoretical models fail to explain the experimental results. The results gathered provide necessary information for the interpretation of relevant electrophoresis data in practice, and for nanofluidic applications such as biomimetic ion channels and nanopore-based sensing of single biomolecules.
URI
http://hdl.handle.net/YU.REPOSITORY/26812http://dx.doi.org/10.1039/c2nr32277c
ISSN
2040-3364
Appears in Collections:
공과대학 > 기계공학부 > Articles
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