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- W2771134986 abstract "Enzyme-like nanocatalytic reactions developed for high signal amplification in biosensors are of limited use because of their low reaction rates and/or unwanted side reactions in aqueous electrolyte solutions containing dissolved O2. Herein, we report a nitrosoreductase-like catalytic reaction, employing 4-nitroso-1-naphthol, Pd nanoparticles, and H3N–BH3, which affords a high reaction rate and minimal side reactions, enabling its use in ultrasensitive electrochemical biosensors. 4-Nitroso-1-naphthol was chosen after five hydroxy-nitro(so)arene compounds were compared in terms of high signal and low background levels. Importantly, the nanocatalytic reaction occurs without the self-hydrolysis and induction period observed in the nanocatalytic reduction of nitroarenes by NaBH4. The high signal level results from (i) fast nanocatalytic 4-nitroso-1-naphthol reduction, (ii) fast electrochemical redox cycling, and (iii) the low influence of dissolved O2. The low background level results from (i) slow direct reaction between 4-nitroso-1-naphthol and H3N–BH3, (ii) slow electrode-mediated reaction between 4-nitroso-1-naphthol and H3N–BH3, and (iii) slow electrooxidation of H3N–BH3 at electrode. When applied to the detection of parathyroid hormone, the detection limit of the newly developed biosensor was ∼0.3 pg/mL. The nitrosoreductase-like nanocatalytic reaction is highly promising for ultrasensitive and stable biosensing." @default.
- W2771134986 created "2017-12-22" @default.
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- W2771134986 date "2017-12-14" @default.
- W2771134986 modified "2023-10-13" @default.
- W2771134986 title "Nitrosoreductase-Like Nanocatalyst for Ultrasensitive and Stable Biosensing" @default.
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- W2771134986 doi "https://doi.org/10.1021/acs.analchem.7b03364" @default.
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