A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Generation of free radicals and electrochemiluminescence at pulse-polarized oxide-covered silicon electrodes in aqueous solutions
Tekijät: Ala-Kleme T, Kulmala S, Latva M
Kustantaja: MUNKSGAARD INT PUBL LTD
Julkaisuvuosi: 1997
Lehti: Acta Chemica Scandinavica
Tietokannassa oleva lehden nimi: ACTA CHEMICA SCANDINAVICA
Lehden akronyymi: ACTA CHEM SCAND
Vuosikerta: 51
Numero: 5
Aloitussivu: 541
Lopetussivu: 546
Sivujen määrä: 6
ISSN: 0904-213X
DOI: https://doi.org/10.3891/acta.chem.scand.51-0541
Tiivistelmä
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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