title: Smart modification of the single conical nanochannel to fabricate dual-responsive ion gate by self-initiated photografting and photopolymerization.
abstract: A simple, rapid and general method of self-initiated photografting and photopolymerization (SIPGP) was first introduced to fabricate dual-responsive nanochannel with a solid-state conical nanopore for the first time. The high density of carboxyl and hydroxyl groups on the internal surface of the etched poly(ethylene terephthalate) (PET) nanochannel acted as photo-active sites to provide further growth and amplification of polymer brushes via SIPGP. Poly[2-(dimethylamino)ethyl methacrylate] (PDMAEMA) was chosen as a prototypical polymer which can be grafted on the surface of the nanochannel with high efficiency. SIPGP provided a smart and simple strategy to graft polymer brush on the surface of the nanochannel without the need of a surface bonded initiator. Series of characterizations including current-voltage curves, scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) indicated the successful construction of the polymer. The functionalized nanochannel was finally used for the construction of smart gate with perfect responsibility, reversibility and stability towards CO2 and temperature. This modification strategy combined with unique character of the polymer may hold a great potential in building various smart responsive systems.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China; University of Chinese Academy of Sciences, Beijing 100039, China.
authors.forename: Qingfeng
authors.initials: Q
authors.lastname: Zhai
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China; University of Chinese Academy of Sciences, Beijing 100039, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Jiang
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China; University of Chinese Academy of Sciences, Beijing 100039, China.
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China; University of Chinese Academy of Sciences, Beijing 100039, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China; University of Chinese Academy of Sciences, Beijing 100039, China.
authors.forename: Erkang
authors.initials: E
authors.lastname: Wang
mesh_terms: D008689:Methacrylates / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D058608:Nanopores / Q000648:ultrastructure; D009757:Nylons / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D011093:Polyethylene Terephthalates / Q000737:chemistry*; D058105:Polymerization
chemical_list: D008689:Methacrylates; D009757:Nylons; D011093:Polyethylene Terephthalates; C407037:poly(2-(dimethylamino)ethyl methacrylate)
keywords: Conical nanochannel; Dual-responsive ion gate; Self-Initiated photografting and photopolymerization; Smart modification