PH-mediated regulation of polymer transport through SiN pores

Sahin Buyukdagli, T. Ala-Nissila

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

3 Sitaatiot (Scopus)

Abstrakti

We characterize the pH-controlled polymer capture and transport through silicon nitride (SiN) pores subject to protonation. A charge regulation model able to reproduce the experimental zeta potential of SiN pores is coupled with electrohydrodynamic polymer transport equations. The formalism can quantitatively explain the experimentally observed non-monotonic pH dependence of avidin conductivity in terms of the interplay between the electroosmotic and electrophoretic drag forces on the protein. We also scrutinize the DNA conductivity of SiN pores. We show that in the low-pH regime where the amphoteric pore is cationic, DNA-pore attraction acts as an electrostatic trap. This provides a favorable condition for fast polymer capture and extended translocation required for accurate polymer sequencing.

AlkuperäiskieliEnglanti
Artikkeli38003
Sivut1-7
JulkaisuEPL
Vuosikerta123
Numero3
DOI - pysyväislinkit
TilaJulkaistu - 1 elokuuta 2018
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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