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Charge-selective transport of organic and protein analytes through synthetic nanochannels

Nguyen, Quoc Hung and Ali, Mubarak and Bayer, Veronika and Neumann, Reinhard and Ensinger, Wolfgang :
Charge-selective transport of organic and protein analytes through synthetic nanochannels.
[Online-Edition: http://iopscience.iop.org/0957-4484/21/36/365701/]
In: Nanotechnology, 21 (36) p. 365701.
[Article] , (2010)

Official URL: http://iopscience.iop.org/0957-4484/21/36/365701/

Abstract

We present an experimental demonstration of a synthetic nanoporous membrane suitable for charge-selective transport of ionic species. The surfaces and walls of synthetic nanochannels, fabricated in heavy ion-tracked polyethylene terephthalate membranes are negatively charged due to the presence of carboxylate moieties. These nanofilters discriminate and gate the transport of cations while inhibiting the passage of anions. The permselectivity of these membranes is reversed by converting the carboxylic moieties into terminated amino groups. The positively charged (aminated) membranes facilitate the transport of anions. Based on the same principle, charged biomolecules (bovine serum albumin and lysozyme) are successfully filtered through these membranes. These membranes also exhibit the phenomenon of ion concentration polarization.

Item Type: Article
Erschienen: 2010
Creators: Nguyen, Quoc Hung and Ali, Mubarak and Bayer, Veronika and Neumann, Reinhard and Ensinger, Wolfgang
Title: Charge-selective transport of organic and protein analytes through synthetic nanochannels
Language: English
Abstract:

We present an experimental demonstration of a synthetic nanoporous membrane suitable for charge-selective transport of ionic species. The surfaces and walls of synthetic nanochannels, fabricated in heavy ion-tracked polyethylene terephthalate membranes are negatively charged due to the presence of carboxylate moieties. These nanofilters discriminate and gate the transport of cations while inhibiting the passage of anions. The permselectivity of these membranes is reversed by converting the carboxylic moieties into terminated amino groups. The positively charged (aminated) membranes facilitate the transport of anions. Based on the same principle, charged biomolecules (bovine serum albumin and lysozyme) are successfully filtered through these membranes. These membranes also exhibit the phenomenon of ion concentration polarization.

Journal or Publication Title: Nanotechnology
Volume: 21
Number: 36
Publisher: IOP Publishing
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 24 Aug 2010 15:45
Official URL: http://iopscience.iop.org/0957-4484/21/36/365701/
Funders: Q H Nguyen thanks the Gottlieb Daimler- und Karl Benz- Stiftung for financial support., M Ali and W Ensinger acknowledge financial support by the Beilstein-Institut, Frankfurt/Main, Germany, within the research collaboration NanoBiC.
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