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- W2022382738 abstract "In this paper, highly ordered titania nanotube (TNT) arrays fabricated by anodization were annealed at different temperatures in CO to create different concentrations of surface defects. The samples were characterized by SEM, XRD and XPS. The results showed different concentrations of Ti3+ defects were doped in TNT arrays successfully. Furthermore, after co-immobilized with horseradish peroxidase (HRP) and thionine chloride (Th), TNT arrays was employed as a biosensor to detect hydrogen peroxide (H2O2) using an amperometric method. Cyclic voltammetry results and UV–Vis absorption spectra presented that with an increase of Ti3+ defects concentration, the electron transfer rate and enzyme adsorption amount of TNT arrays were improved largely, which could be ascribed to the creation of hydroxyl groups on TNT surface due to dissociative adsorption of water by Ti3+ defects. Annealing in CO at 500 °C appeared to be the most favorable condition to achieve desirable nanotube array structure and surface defects density (0.27%), thus the TNT arrays showed the largest adsorption amount of enzyme (9.16 μg/cm2), faster electron transfer rate (1.34 × 10−3 cm/s) and the best response sensitivity (88.5 μA/mM l−1)." @default.
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- W2022382738 date "2011-07-01" @default.
- W2022382738 modified "2023-10-17" @default.
- W2022382738 title "Effect of surface defects on biosensing properties of TiO2 nanotube arrays" @default.
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- W2022382738 doi "https://doi.org/10.1016/j.snb.2010.11.041" @default.
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