Premium
Ionic Transport Through Single Solid‐State Nanopores Controlled with Thermally Nanoactuated Macromolecular Gates
Author(s) -
Yameen Basit,
Ali Mubarak,
Neumann Reinhard,
Ensinger Wolfgang,
Knoll Wolfgang,
Azzaroni Omar
Publication year - 2009
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200801318
Subject(s) - nanopore , lower critical solution temperature , materials science , ionic bonding , nanotechnology , solid state , poly(n isopropylacrylamide) , macromolecule , chemical engineering , ion , polymer chemistry , polymer , chemistry , copolymer , organic chemistry , composite material , biochemistry , engineering
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.