Single Conical Nanopores Displaying pH-Tunable Rectifying Characteristics. Manipulating Ionic Transport With Zwitterionic Polymer Brushes

Yameen, Basit and Ali, Mubarak and Neumann, Reinhard and Ensinger, Wolfgang and Knoll, Wolfgang and Azzaroni, Omar :
Single Conical Nanopores Displaying pH-Tunable Rectifying Characteristics. Manipulating Ionic Transport With Zwitterionic Polymer Brushes.
[Online-Edition: http://dx.doi.org/10.1021/ja8086104]
In: Journal of the American Chemical Society, 131 (6) pp. 2070-2071.
[Article] , (2009)

Official URL: http://dx.doi.org/10.1021/ja8086104

Abstract

In this work we describe for the first time the integration of "smart" polymer brushes into single conical nanopores to obtain a new highly functional signal-responsive chemical nanodevice. The responsive brushes were constituted of zwitterionic monomers whose charge is regulated via pH changes in the environmental conditions. The pH-dependent chemical equilibrium of the monomer units provides a fine-tuning of the ionic transport though the nanopore by simply presetting the pH of the electrolyte solution. Our results demonstrate that this strategy enables a higher degree of control over the rectification properties when compared to the nanochannels modified with charged monolayer assemblies. We envision that these results will create completely new avenues to build-up "smart" nanodevices using responsive polymer brushes integrated into single conical nanopores.

Item Type:	Article
Erschienen:	2009
Creators:	Yameen, Basit and Ali, Mubarak and Neumann, Reinhard and Ensinger, Wolfgang and Knoll, Wolfgang and Azzaroni, Omar
Title:	Single Conical Nanopores Displaying pH-Tunable Rectifying Characteristics. Manipulating Ionic Transport With Zwitterionic Polymer Brushes
Language:	English
Abstract:	In this work we describe for the first time the integration of "smart" polymer brushes into single conical nanopores to obtain a new highly functional signal-responsive chemical nanodevice. The responsive brushes were constituted of zwitterionic monomers whose charge is regulated via pH changes in the environmental conditions. The pH-dependent chemical equilibrium of the monomer units provides a fine-tuning of the ionic transport though the nanopore by simply presetting the pH of the electrolyte solution. Our results demonstrate that this strategy enables a higher degree of control over the rectification properties when compared to the nanochannels modified with charged monolayer assemblies. We envision that these results will create completely new avenues to build-up "smart" nanodevices using responsive polymer brushes integrated into single conical nanopores.
Journal or Publication Title:	Journal of the American Chemical Society
Volume:	131
Number:	6
Publisher:	ACS Publications
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:	15 Jul 2009 12:46
Official URL:	http://dx.doi.org/10.1021/ja8086104
Funders:	B.Y. acknowledges support from the Higher Education Commission (HEC) of Pakistan and Deutscher Akademischer Austauschdienst (DAAD) (Code #A/04/30795)., M.A. thanks the HEC of Pakistan, on receiving partial financial support., O.A. is a CONICET fellow and acknowledges financial support from the Alexander von Humboldt Foundation, the Max Planck Society, and the Centro Interdisciplinario de Nanociencia y Nanotecnología (CINN) (ANPCyT − Argentina)
Export:

Optionen (nur für Redakteure)

View Item