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- W3161330494 abstract "Peroxidase is a popular amplifier of biosensor signals, but its application is limited by chemical instability and expensive purification. We developed a sensitive, novel colorimetric biosensor to detect glucose and hydrogen peroxide (H2O2) using Zinc tetrakis (4-pyridinyl) porphyrin (ZnTPyP)-dodecyl trimethyl ammonium bromide (DTAB) nanoparticles (NPs) as peroxidase-like catalysts. ZnTPyP-DTAB NPs can oxidize colorless 3, 3’, 5, 5’-tetramethylbenzidine to a blue product (652 nm) in the presence of H2O2 via electron transport between porphyrin and bromine. This peroxidation mechanism was further verified using quantum chemical calculations. The detection limits of the colorimetric ZnTPyP-DTAB NP sensor were 0.15 and 0.5 μmol L−1 for glucose and H2O2, respectively, and the linear range was 3–70 and 8–50 μmol L−1, respectively. Recovery ratios of the biosensor in spiked human serum and saliva samples were 100 % ± 10 %. This simple method is robust, color stable, and reliable, thus providing an effective colorimetric biosensing platform for biomedical diagnosis." @default.
- W3161330494 created "2021-05-24" @default.
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- W3161330494 date "2021-09-01" @default.
- W3161330494 modified "2023-10-12" @default.
- W3161330494 title "Rapid and highly sensitive colorimetric biosensor for the detection of glucose and hydrogen peroxide based on nanoporphyrin combined with bromine as a peroxidase-like catalyst" @default.
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- W3161330494 doi "https://doi.org/10.1016/j.snb.2021.130104" @default.
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