Ali, Mubarak and Nasir, Saima and Ramirez, Patricio and Ahmed, Ishtiaq and Nguyen, Quoc Hung and Fruk, Ljiljana and Mafe, Salvador and Ensinger, Wolfgang (2012):
Optical Gating of Photosensitive Synthetic Ion Channels.
In: Advanced Functional Materials, 22 (2), WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, pp. 390-396, [Online-Edition: http://onlinelibrary.wiley.com/doi/10.1002/adfm.201102146/ab...],
[Article]
Abstract
4-oxo-4-(pyren-4-ylmethoxy) butanoic acid is used as a photolabile protecting group to show the optical gating of nanofluidic devices based on synthetic ion channels. The inner surface of the channels is decorated with monolayers of photolabile hydrophobic molecules that can be removed by irradiation, which leads to the generation of hydrophilic groups. This process can be exploited in the UV-light-triggered permselective transport of ionic species in aqueous solution through the channels. The optical gating of a single conical nanochannel and multichannel polymeric membranes is characterised experimentally and theoretically by means of current-voltage and selective permeation measurements, respectively. It is anticipated that the integration of nanostructures into multifunctional devices is feasible and can readily find applications in light-induced controlled release, sensing, and information processing.
| Item Type: | Article |
|---|---|
| Erschienen: | 2012 |
| Creators: | Ali, Mubarak and Nasir, Saima and Ramirez, Patricio and Ahmed, Ishtiaq and Nguyen, Quoc Hung and Fruk, Ljiljana and Mafe, Salvador and Ensinger, Wolfgang |
| Title: | Optical Gating of Photosensitive Synthetic Ion Channels |
| Language: | English |
| Abstract: | 4-oxo-4-(pyren-4-ylmethoxy) butanoic acid is used as a photolabile protecting group to show the optical gating of nanofluidic devices based on synthetic ion channels. The inner surface of the channels is decorated with monolayers of photolabile hydrophobic molecules that can be removed by irradiation, which leads to the generation of hydrophilic groups. This process can be exploited in the UV-light-triggered permselective transport of ionic species in aqueous solution through the channels. The optical gating of a single conical nanochannel and multichannel polymeric membranes is characterised experimentally and theoretically by means of current-voltage and selective permeation measurements, respectively. It is anticipated that the integration of nanostructures into multifunctional devices is feasible and can readily find applications in light-induced controlled release, sensing, and information processing. |
| Journal or Publication Title: | Advanced Functional Materials |
| Volume: | 22 |
| Number: | 2 |
| Publisher: | WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
| Uncontrolled Keywords: | current rectification, optical gating, photosensitive nanostructures, polymer membranes, synthetic ion channels |
| 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: | 19 Jan 2012 13:15 |
| Official URL: | http://onlinelibrary.wiley.com/doi/10.1002/adfm.201102146/ab... |
| Funders: | M.A., S.N., Q.H.N., and W.E. gratefully acknowledge financial support by the Beilstein-Institut, Frankfurt/Main, Germany, within the research collaboration NanoBiC., P.R. and S.M. acknowledge the financial support from the Ministry of Science and Innovation of Spain, Programme of Materials (project No. MAT2009-07747), and FEDER., I.A. and L.F. were financially supported by KIT Excellence Initiative, project A5.7. |
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