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

Yameen, Basit ; Ali, Mubarak ; Neumann, Reinhard ; Ensinger, Wolfgang ; Knoll, Wolfgang ; 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.
[Artikel], (2009)

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

Kurzbeschreibung (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.

Typ des Eintrags:	Artikel
Erschienen:	2009
Autor(en):	Yameen, Basit ; Ali, Mubarak ; Neumann, Reinhard ; Ensinger, Wolfgang ; Knoll, Wolfgang ; Azzaroni, Omar
Titel:	Single Conical Nanopores Displaying pH-Tunable Rectifying Characteristics. Manipulating Ionic Transport With Zwitterionic Polymer Brushes
Sprache:	Englisch
Kurzbeschreibung (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.
Titel der Zeitschrift, Zeitung oder Schriftenreihe:	Journal of the American Chemical Society
Band:	131
(Heft-)Nummer:	6
Verlag:	ACS Publications
Fachbereich(e)/-gebiet(e):	Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Materialanalytik Fachbereich Material- und Geowissenschaften > Materialwissenschaften Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum:	15 Jul 2009 12:46
Offizielle URL:	http://dx.doi.org/10.1021/ja8086104
Sponsoren:	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)
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