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Issue 5, 2010
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Electrospun Ru(bpy)32+-doped nafion nanofibers for electrochemiluminescence sensing

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Abstract

Electrospun Ru(bpy)32+-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)32+, and a better stability of the Ru(bpy)32+ immobilization. As a result, the nanofibers' ECL signal is enhanced ∼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.

Graphical abstract: Electrospun Ru(bpy)32+-doped nafion nanofibers for electrochemiluminescence sensing

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Publication details

The article was received on 05 Nov 2009, accepted on 29 Jan 2010 and first published on 11 Feb 2010


Article type: Paper
DOI: 10.1039/B923031A
Citation: Analyst, 2010,135, 1004-1009
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    Electrospun Ru(bpy)32+-doped nafion nanofibers for electrochemiluminescence sensing

    C. Zhou, Z. Liu, J. Dai and D. Xiao, Analyst, 2010, 135, 1004
    DOI: 10.1039/B923031A

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