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