A1 Refereed original research article in a scientific journal
Generation of free radicals and electrochemiluminescence at pulse-polarized oxide-covered silicon electrodes in aqueous solutions
Authors: Ala-Kleme T, Kulmala S, Latva M
Publisher: MUNKSGAARD INT PUBL LTD
Publication year: 1997
Journal: Acta Chemica Scandinavica
Journal name in source: ACTA CHEMICA SCANDINAVICA
Journal acronym: ACTA CHEM SCAND
Volume: 51
Issue: 5
First page : 541
Last page: 546
Number of pages: 6
ISSN: 0904-213X
DOI: https://doi.org/10.3891/acta.chem.scand.51-0541
Abstract
Cathodic pulse-polarization of thin-oxide-film-covered highly doped silicon electrodes induces tunnel emission of hot electrons into aqueous electrolyte solutions probably resulting in an electrochemical generation of hydrated electrons. Generation of hydrated electrons allows simultaneous production of sulfate radicals from peroxydisulfate ions, and hence, highly reactive radicals are generated in the vicinity of the electrode surface. Generated primary radical species can induce strong redox luminescence from various organic chemiluminophores and luminescent metal chelates, e.g., some lanthanide and transition metal chelates can be detected below nanomolar levels with a linear range of calibration curves of over six orders of magnitude.
Cathodic pulse-polarization of thin-oxide-film-covered highly doped silicon electrodes induces tunnel emission of hot electrons into aqueous electrolyte solutions probably resulting in an electrochemical generation of hydrated electrons. Generation of hydrated electrons allows simultaneous production of sulfate radicals from peroxydisulfate ions, and hence, highly reactive radicals are generated in the vicinity of the electrode surface. Generated primary radical species can induce strong redox luminescence from various organic chemiluminophores and luminescent metal chelates, e.g., some lanthanide and transition metal chelates can be detected below nanomolar levels with a linear range of calibration curves of over six orders of magnitude.
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