AbstractThis study introduces a two-step method for the deposition of branched silver nanowires (AgNWs) on fluorine-doped tin oxide (FTO) glass. This material serves as both an active surface-enhanced Raman-scattering (SERS) substrate and as an enzyme-free electrochemical sensor for H2O2. This dual functionality is systematically studied. The AgNWs as the main trunk were first deposited on FTO by spray-coating. Silver branches were then electrochemically produced on the preformed NWs. Scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectrometry were employed to characterize morphology, composition and microstructure. SERS experiments show that the branched AgNW/FTO substrate exhibits excellent performance in detecting 4-aminothiophenol at an ultra-low concentration of 0.1 fM. Simultaneously, this material displays an excellent electrocatalytic response to H2O2 reduction at a concentration as low as 1 μM. The sensor has a rapid response and two linear analytical ranges that extend from 0.25 to 300 μM, and from 0.3 to 2.6 mM of H2O2, respectively. The ultrahigh sensitivity and satisfactory reproducibility highlights the merit of this hierarchical AgNW dendritic structure for sensing applications. Graphical abstractBranched silver nanowires can serve as both an active surface-enhanced Raman scattering substrate and as an electrochemical sensor for H2O2. This dual functionality is systematically investigated.

中文翻译：

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掺氟氧化锡玻璃上的支化银纳米线，用于通过 SERS 同时安培检测 H2O2 和 4-氨基苯硫酚

摘要本研究介绍了一种在掺氟氧化锡 (FTO) 玻璃上沉积支化银纳米线 (AgNW) 的两步法。这种材料既可用作活性表面增强拉曼散射 (SERS) 底物，又可用作 H2O2 的无酶电化学传感器。系统地研究了这种双重功能。作为主干的 AgNW 首先通过喷涂沉积在 FTO 上。然后在预制的 NW 上电化学产生银分支。采用扫描电子显微镜、X 射线衍射和 X 射线光电子能谱法来表征形态、成分和微观结构。SERS 实验表明，支化的 AgNW/FTO 底物在 0.1 fM 的超低浓度下在检测 4-氨基苯硫酚方面表现出优异的性能。同时地，这种材料在低至 1 μM 的浓度下对 H2O2 的还原表现出出色的电催化响应。该传感器具有快速响应和两个线性分析范围，分别从 0.25 到 300 μM 和 0.3 到 2.6 mM H2O2。超高灵敏度和令人满意的重现性突出了这种分层 AgNW 树突状结构在传感应用中的优点。图形摘要支链银纳米线既可以作为活性表面增强拉曼散射基板，也可以作为 H2O2 的电化学传感器。系统地研究了这种双重功能。超高灵敏度和令人满意的重现性突出了这种分层 AgNW 树突状结构在传感应用中的优点。图形摘要支链银纳米线既可以作为活性表面增强拉曼散射基板，也可以作为 H2O2 的电化学传感器。系统地研究了这种双重功能。超高灵敏度和令人满意的重现性突出了这种分层 AgNW 树突状结构在传感应用中的优点。图形摘要支链银纳米线既可以作为活性表面增强拉曼散射基板，也可以作为 H2O2 的电化学传感器。系统地研究了这种双重功能。