dc.contributor.author
Gravelle, Simon
dc.contributor.author
Netz, Roland R.
dc.contributor.author
Bocquet, Lydéric
dc.date.accessioned
2020-09-03T08:20:54Z
dc.date.available
2020-09-03T08:20:54Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/27356
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-27112
dc.description.abstract
Ionic current measurements through solid-state nanopores consistently show a power spectral density that scales as 1/f α at low frequency f, with an exponent α ∼ 0.5–1.5, but strikingly, the physical origin of this behavior remains elusive. Here, we perform simulations of particles reversibly adsorbing at the surface of a nanopore and show that the fluctuations in the number of adsorbed particles exhibit low-frequency pink noise. We furthermore propose theoretical modeling for the time-dependent adsorption of particles on the nanopore surface for various geometries, which predicts a frequency spectrum in very good agreement with the simulation results. Altogether, our results highlight that the low-frequency noise takes its origin in the reversible adsorption of ions at the pore surface combined with the long-lasting excursions of the ions in the reservoirs. The scaling regime of the power spectrum extends down to a cutoff frequency which is far smaller than simple diffusion estimates. Using realistic values for the pore dimensions and the adsorption–desorption kinetics, this predicts the observation of pink noise for frequencies down to the hertz for a typical solid-state nanopore, in good agreement with experiments.
en
dc.format.extent
10 Seiten
dc.rights.uri
http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen
dc.subject
power spectral density
en
dc.subject
molecular dynamics
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik::530 Physik
dc.title
Adsorption kinetics in open nanopores as a source of low-frequency noise
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.doi
10.1021/acs.nanolett.9b02858
dcterms.bibliographicCitation.journaltitle
Nano letters
dcterms.bibliographicCitation.number
10
dcterms.bibliographicCitation.pagestart
7265
dcterms.bibliographicCitation.pageend
7272
dcterms.bibliographicCitation.volume
19
dcterms.bibliographicCitation.url
https://doi.org/10.1021/acs.nanolett.9b02858
refubium.affiliation
Physik
refubium.note.author
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.nanolett.9b02858.
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
1530-6984
dcterms.isPartOf.eissn
1530-6992