Electrospun Ru(bpy)(3)(2+)-doped nafion nanofibers for electrochemiluminescence sensing.
Electrospun Ru(bpy)(3)(2+)-doped Nafion (ERDN) nanofibers were successfully fabricated by a one-step electrospinning technique. The diameters of the nanofibers range from 120 nm to 220 nm. The ERDN nanofibers, evenly distributed on the substrate with their random orientations, form a porous 3-D structure nanofibrous membrane. Compared to continuous thin films, the obtained nanofibrous membrane maintains a higher surface-area-to-volume ratio, a larger amount of immobilized-Ru(bpy)(3)(2+), and a better stability of the Ru(bpy)(3)(2+) immobilization. As a result, the nanofibers' ECL signal is enhanced approximately 15-fold and stable (does not change during continuous CV scans for 50 cycles). As a sensing platform, the nanofibers can sensitively detect low concentration phenolic compounds by monitoring the phenol-dependent ECL intensity change. The detection limit for phenol is 1.0 nM based on a signal/noise ratio >3, which is comparable or better than that in reported phenol assays. In addition, the nanofibers exhibit excellent ECL behaviors on Au, Pt, GC and ITO electrodes. A great potential for ERDN nanofibers-based ECL sensors is offered.
Zhou
Cuisong
C
College of Chemistry, Sichuan University, Chengdu, 610065, P. R. China.
Liu
Zhen
Z
Dai
Jianyuan
J
Xiao
Dan
D
D015082:2,2'-Dipyridyl / Q000031:analogs & derivatives* / Q000737:chemistry; D056831:Coordination Complexes; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D005465:Fluorocarbon Polymers / Q000737:chemistry*; D008163:Luminescent Measurements / Q000295:instrumentation / Q000379:methods*; D057139:Nanofibers / Q000737:chemistry* / Q000648:ultrastructure; D017975:Ruthenium Compounds
D015082:2,2'-Dipyridyl; D056831:Coordination Complexes; D005465:Fluorocarbon Polymers; C547232:tris(2,2-bipyridine)-ruthenium(II); D017975:Ruthenium Compounds; C040402:perfluorosulfonic acid