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Title: Non-scaling behavior of electroosmotic flow in voltage-gated nanopores

Abstract

Ionic transport through nanopores is of fundamental importance for the design and development of nanofiltration membranes and novel electrochemical devices including supercapacitors, fuel cells and batteries. Recent experiments have shown an unusual variation of electrical conductance with the pore size and the electrolyte parameters that defies conventional scaling relations. Here ionic transport through voltage-gated nanopores was studied by using the classical density functional theory for ion distributions in combination with the Navier–Stokes equation for the electroosmotic flow. We also identified a significant influence of the gating potential on the scaling behavior of the conductance with changes in the pore size and the salt concentration. Finally, for ion transport in narrow pores with a high gating voltage, the conductivity shows an oscillatory dependence on the pore size owing to the strong overlap of electric double layers.

Authors:
 [1];  [2];  [3];  [2]
  1. East China Univ. of Science and Technology, Shanghai (People's Republic of China). State Key Lab. of Chemical Engineering; Univ. of California, Riverside, CA (United States). Dept. of Chemical and Environmental Engineering
  2. Univ. of California, Riverside, CA (United States). Dept. of Chemical and Environmental Engineering
  3. East China Univ. of Science and Technology, Shanghai (People's Republic of China). State Key Lab. of Chemical Engineering
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1399373
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Chemistry Chemical Physics. PCCP (Print)
Additional Journal Information:
Journal Volume: 19; Journal Issue: 1; Journal ID: ISSN 1463-9076
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; ionic transport; voltage-gated nanopores; conductance; classical density functional theory; electric double layers

Citation Formats

Lian, Cheng, Gallegos, Alejandro, Liu, Honglai, and Wu, Jianzhong. Non-scaling behavior of electroosmotic flow in voltage-gated nanopores. United States: N. p., 2016. Web. doi:10.1039/c6cp07124d.
Lian, Cheng, Gallegos, Alejandro, Liu, Honglai, & Wu, Jianzhong. Non-scaling behavior of electroosmotic flow in voltage-gated nanopores. United States. doi:10.1039/c6cp07124d.
Lian, Cheng, Gallegos, Alejandro, Liu, Honglai, and Wu, Jianzhong. Thu . "Non-scaling behavior of electroosmotic flow in voltage-gated nanopores". United States. doi:10.1039/c6cp07124d. https://www.osti.gov/servlets/purl/1399373.
@article{osti_1399373,
title = {Non-scaling behavior of electroosmotic flow in voltage-gated nanopores},
author = {Lian, Cheng and Gallegos, Alejandro and Liu, Honglai and Wu, Jianzhong},
abstractNote = {Ionic transport through nanopores is of fundamental importance for the design and development of nanofiltration membranes and novel electrochemical devices including supercapacitors, fuel cells and batteries. Recent experiments have shown an unusual variation of electrical conductance with the pore size and the electrolyte parameters that defies conventional scaling relations. Here ionic transport through voltage-gated nanopores was studied by using the classical density functional theory for ion distributions in combination with the Navier–Stokes equation for the electroosmotic flow. We also identified a significant influence of the gating potential on the scaling behavior of the conductance with changes in the pore size and the salt concentration. Finally, for ion transport in narrow pores with a high gating voltage, the conductivity shows an oscillatory dependence on the pore size owing to the strong overlap of electric double layers.},
doi = {10.1039/c6cp07124d},
journal = {Physical Chemistry Chemical Physics. PCCP (Print)},
issn = {1463-9076},
number = 1,
volume = 19,
place = {United States},
year = {2016},
month = {11}
}

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