Hot Electron Induced Cathodic Electrochemiluminescence at Disposable Screen Printed Carbon Electrodes

Hot electron induced cathodic electrochemiluminescence (ECL) was observed at screen printed carbon electrodes (SPCEs) during pulse polarization. The thin insulating film resulted from the printing inks was found to be suitable for generating hot electrons, which can further be converted to hydrated...

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Bibliographic Details
Published in:Electroanalysis (New York, N.Y.) N.Y.), 2010-11, Vol.22 (22), p.2702-2707
Main Authors: Wu, Ai-Hong, Sun, Jian-Jun, Fang, Yi-Min, Zheng, Rui-Juan, Chen, Guo-Nan
Format: Article
Language:English
Subjects:
Aluminum oxide
Carbon
Cathodic electrochemiluminescence (ECL)
Electrochemiluminescence
Electrodes
Hot electrons
Luminescence
Quercetin
Ru(bpy)32
Screen printed carbon electrodes (SPCEs)
Screens
Statistical process control
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Summary:Hot electron induced cathodic electrochemiluminescence (ECL) was observed at screen printed carbon electrodes (SPCEs) during pulse polarization. The thin insulating film resulted from the printing inks was found to be suitable for generating hot electrons, which can further be converted to hydrated electrons and induce the subsequent luminescence. Compared with disposable Al/Al2O3 electrode, SPCEs show more stable and reproducible ECL in a wider pH range without background emission. A sensitive ECL method for determination of quercetin is proposed. The detection limit is 8.0×10−10 mol L−1(S/N=3), which is two magnitudes lower than that of common ECL method.
ISSN:1040-0397
1521-4109
1521-4109
DOI:10.1002/elan.201000233