Ionic Transport Through Single Solid-State Nanopores Controlled with Thermally Nanoactuated Macromolecular Gates

Single solid‐state nanopores modified with poly‐N‐isopropylacrylamide (NIPAM) brushes display thermally controlled gating properties. Below the lower critical solubility temperature (LCST) NIPAM brushes are swollen and, consequently, dramatically reduce the effective cross section of the nanopores (...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2009-06, Vol.5 (11), p.1287-1291
Main Authors: Yameen, Basit, Ali, Mubarak, Neumann, Reinhard, Ensinger, Wolfgang, Knoll, Wolfgang, Azzaroni, Omar
Format: Article
Language:English
Subjects:
ion channels
Ion Channels - chemistry
membranes
molecular devices
Nanostructures - chemistry
nanotechnology
Nanotechnology - methods
polymers
Polymers - chemistry
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Summary:Single solid‐state nanopores modified with poly‐N‐isopropylacrylamide (NIPAM) brushes display thermally controlled gating properties. Below the lower critical solubility temperature (LCST) NIPAM brushes are swollen and, consequently, dramatically reduce the effective cross section of the nanopores (see image). Conversely, above the LCST the brushes dehydrate and suffer a transition into a collapsed state, which promotes the widening of the nanopore and enables a substantial flow of ions.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.200801318