title: Sulfonated poly(ether ether ketone)/polypyrrole core-shell nanofibers: a novel polymeric adsorbent/conducting polymer nanostructures for ultrasensitive gas sensors.
abstract: Conducting polymers-based gas sensors have attracted increasing research attention these years. The introduction of inorganic sensitizers (noble metals or inorganic semiconductors) within the conducting polymers-based gas sensors has been regarded as the generally effective route for further enhanced sensors. Here we demonstrate a novel route for highly-efficient conducting polymers-based gas sensors by introduction of polymeric sensitizers (polymeric adsorbent) within the conducting polymeric nanostructures to form one-dimensional polymeric adsorbent/conducting polymer core-shell nanocomposites, via electrospinning and solution-phase polymerization. The adsorption effect of the SPEEK toward NH₃ can facilitate the mass diffusion of NH₃ through the PPy layers, resulting in the enhanced sensing signals. On the basis of the SPEEK/PPy nanofibers, the sensors exhibit large gas responses, even when exposed to very low concentration of NH₃ (20 ppb) at room temperature.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. wangweirs@hit.edu.cn
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Li
authors.forename: Tingting
authors.initials: T
authors.lastname: Jiang
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Zhao
authors.forename: Ye
authors.initials: Y
authors.lastname: Li
authors.forename: Zhaojie
authors.initials: Z
authors.lastname: Wang
authors.forename: Ce
authors.initials: C
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D000476:Alkanesulfonates / Q000737:chemistry*; D000641:Ammonia / Q000032:analysis*; D001577:Benzophenones; D003217:Conductometry / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000032:analysis*; D007659:Ketones / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D011092:Polyethylene Glycols / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D014159:Transducers
chemical_list: D000476:Alkanesulfonates; D001577:Benzophenones; D005740:Gases; D007659:Ketones; D011108:Polymers; D011758:Pyrroles; C067635:polypyrrole; C063834:polyetheretherketone; D011092:Polyethylene Glycols; D000641:Ammonia