DNA‐Modified Diamond Films

Yang, Nianjun; Nebel, Christoph E.

doi:10.1002/9781118062364.ch21

Cited by 2 publications

(1 citation statement)

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“…It can then be associated with the reactions of intermediates with OH – and/or O 2 •– near the BDD vicinity due to the low adsorption of these species on the anode surface. These findings can contribute to a better properties characterization of the conductive-diamond electrodes, the understanding of the oxidation mechanisms of organics by ROS, and the development of BDD sensors for biomolecules. − …”

Section: Discussionmentioning

confidence: 99%

Unprecedented Electrochemiluminescence of Luminol on a Boron-Doped Diamond Thin-Film Anode. Enhancement by Electrogenerated Superoxide Radical Anion

2012

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Electrochemiluminescence (ECL) of 0.01 M luminol in NaOH medium of pH 12.0 on a boron-doped diamond (BDD) thin-film anode was studied in the absence and presence of H 2 O 2 . Here we show a new characteristic property of BDD allowing light emission in a wide potential range of 0.5−5.0 V vs Ag|AgCl, KCl(sat.), a behavior not observed for other anodes. Maximum ECL intensity was found at 2.2−2.8 V without H 2 O 2 , which became 63 times more intense after adding 0.05 M H 2 O 2 . The strong enhancement of ECL in the presence of H 2 O 2 is attributed to the larger production of emitter 3-aminophthalate dianion, formed by selective nucleophilic attack of superoxide radical anion (O 2 •−) to the radical electrogenerated from one-electron oxidation of the monoanionic form of luminol. Linear sweep voltammetry showed that • OH was not generated from OH − oxidation, whereas O 2•− can be produced from HO 2 − oxidation. The performance of O 2 •− in ECL was confirmed by p-benzoquinone quenching.

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Section: Discussionmentioning

confidence: 99%