Osmotically-driven transport in carbon nanotube porins

Kyunghoon Kim, Jia Geng, Ramya Tunuguntla, Luis R. Comolli, Costas P. Grigoropoulos, Caroline M. Ajo-Franklin, Aleksandr Noy

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

We report the measurements of transport of ions and uncharged species through carbon nanotube (CNT) porins-short segments of CNTs inserted into a lipid bilayer membrane. Rejection characteristics of the CNT porins are governed by size exclusion for the uncharged species. In contrast, rejection of ionic species is governed by the electrostatic repulsion and Donnan membrane equilibrium. Permeability of monovalent cations follows the general trend in the hydrated ion size, except in the case of Cs+ ions.

Original languageEnglish (US)
Pages (from-to)7051-7056
Number of pages6
JournalNano Letters
Volume14
Issue number12
DOIs
StatePublished - Dec 10 2014
Externally publishedYes

Keywords

  • carbon nanotubes
  • CNT porins
  • ion selectivity
  • Molecular transport
  • nanopores

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

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