Analytical solutions for viscoelectric effects in electrokinetic nanochannels.
Electrophoresis
; 45(7-8): 676-686, 2024 Apr.
Article
en En
| MEDLINE
| ID: mdl-38350722
ABSTRACT
Understanding electrokinetic transport in nanochannels and nanopores is essential for emerging biological and electrochemical applications. The viscoelectric effect is an important mechanism implicated in the increase of local viscosity due to the polarization of a solvent under a strong electric field. However, most analyses of the viscoelectric effect have been limited to numerical analyses. In this work, we present a set of analytical solutions applicable to the physical description of viscoelectric effects in nanochannel electrokinetic systems. To achieve such closed-form solutions, we employ the Debye-Hückel approximation of small diffuse charge layer potentials compared to the thermal potential. We analyze critical parameters, including electroosmotic flow profiles, electroosmotic mobility, flow rate, and channel conductance. We compare and benchmark our analytical solutions with published predictions from numerical models. Importantly, we leverage these analytical solutions to identify essential thermophysical and nondimensional parameters that govern the behavior of these systems. We identify scaling parameters and relations among surface charge density, ionic strength, and nanochannel height.
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Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Electroósmosis
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Electrophoresis
Año:
2024
Tipo del documento:
Article
País de afiliación:
Estados Unidos