Scaling Behavior of Ionic Transport in Membrane Nanochannels
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Otros documentos de la autoría: Queralt-Martín, María; López Peris, María Lidón; Aguilella-Arzo, Marcel; Aguilella, Vicente; Alcaraz, Antonio
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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Título
Scaling Behavior of Ionic Transport in Membrane NanochannelsAutoría
Fecha de publicación
2018Editor
American Chemical SocietyISSN
1530-6984; 1530-6992Cita bibliográfica
QUERALT-MARTÍN, María, et al. Scaling behavior of ionic transport in membrane nanochannels. Nano letters, 2018, vol. 18, no 10, p. 6604-6610.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://pubs.acs.org/doi/10.1021/acs.nanolett.8b03235Versión
info:eu-repo/semantics/submittedVersionPalabras clave / Materias
Resumen
Ionic conductance in membrane channels
exhibits a power-law dependence on electrolyte concentration
(G ∼ c
α
). The many scaling exponents, α, reported in the
literature usually require detailed interpretations ... [+]
Ionic conductance in membrane channels
exhibits a power-law dependence on electrolyte concentration
(G ∼ c
α
). The many scaling exponents, α, reported in the
literature usually require detailed interpretations concerning
each particular system under study. Here, we critically
evaluate the predictive power of scaling exponents by
analyzing conductance measurements in four biological
channels with contrasting architectures. We show that scaling
behavior depends on several interconnected effects whose
contributions change with concentration so that the use of
oversimplified models missing critical factors could be
misleading. In fact, the presence of interfacial effects could
give rise to an apparent universal scaling that hides the channel distinctive features. We complement our study with 3D
structure-based Poisson−Nernst−Planck (PNP) calculations, giving results in line with experiments and validating scaling
arguments. Our findings not only provide a unified framework for the study of ion transport in confined geometries but also
highlight that scaling arguments are powerful and simple tools with which to offer a comprehensive perspective of complex
systems, especially those in which the actual structure is unknown. [-]
Publicado en
Nano Lett., 2018, 18 (10)Proyecto de investigación
FIS2016-75257-P AEI/FEDER ; P1.1B2015-28Derechos de acceso
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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