Influence of slip velocity at the core of a diffuse soft particle and ion partition effects on mobility

Kundu, Dipankar; Bhattacharyya, S.

doi:10.1140/epje/i2020-11957-8

Cited by 2 publications

(2 citation statements)

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“…The Brinkmann screening length of various core-shell structured bioparticles ranges up to 30 nm [19,20]. In addition, several studies have shown that the dielectric permittivity of peripheral polymeric membrane of such a particle can be significantly lower than that of the aqueous medium [31][32][33][34][35][36]53,54].…”

Section: Resultsmentioning

confidence: 99%

“…Its impact gradually diminishes when the dielectric permittivity of both phases approaches the same value. Considering the effect of ion partitioning, several researchers also studied the electrophoresis of soft particles in extent of binary symmetric electrolyte [35,36]. All the existing results on electrophoretic mobility were used widely to analyze and interpret the experimental data for characterizing the physicochemical properties of these particles [37,38].…”

Section: Introductionmentioning

confidence: 99%

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Electrophoresis of soft particles with hydrophobic inner core grafted with pH‐regulated and highly charged polyelectrolyte layer

et al. 2021

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Electrophoresis of core–shell composite soft particles possessing hydrophobic inner core grafted with highly charged polyelectrolyte layer (PEL) has been studied analytically. The PEL bears pH‐dependent charge properties due to the presence of zwitterionic functional groups. The dielectric permittivity of the PEL and bulk aqueous medium were taken to be different, which resulted in the ion‐partitioning effect. Objective of this study was to provide a simple expression for the mobility of such core–shell soft particles under Donnan limit where the thickness of the PEL well exceeds the electric double layer thickness. Going beyond the widely used Debye–Hückel linearization, the nonlinear Poisson–Boltzmann equation coupled with Stokes–Darcy–Brinkman equations was solved to determine the electrophoretic mobility. The derived expression further recovers all the existing results for the electrophoretic mobility under various simplified cases. The graphical presentation of the results illustrated the impact of pertinent parameters on the electrophoretic mobility of such a soft particle.

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