Surface enhanced Raman spectroscopy (SERS) with both enhanced activity and pronounced thermal stability is very suitable for ultra-sensitive monitoring of thermally assisted chemical bonding/fragmentation reactions in important industrial catalysis. Herein, we report an appealing thermally stable SERS active sensor based on the construction of multiple-branched Au/Ag nanodendrites (NDs). The obtained Au/Ag NDs with tremendous elongated branches and enormous antennas exhibit a much higher SERS activity for dye detection under 785 nm near infrared (NIR) laser irradiation, as compared to as-prepared other reference samples. Meanwhile, the corresponding unique intermetallic synergy can effectively suppress the oxidation of chemically active Ag in a hot environment. It is important that more than 90% SERS activity at room temperature (∼25 ℃) can be well maintained at high temperature (∼170 ℃) within 30 min continuous tests. Thus, it holds great potential for the in-situ SERS monitoring of high-temperature catalytic reactions in the future.

中文翻译：

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设计一种热稳定且高活性的 SERS 光学传感器，用于高温下染料分子的超灵敏检测

表面增强拉曼光谱 (SERS) 具有增强的活性和显着的热稳定性，非常适用于重要工业催化中热辅助化学键合/断裂反应的超灵敏监测。在此，我们报告了一种基于多分支 Au/Ag 纳米枝晶 (ND) 结构的吸引人的热稳定 SERS 有源传感器。与制备的其他参考样品相比，获得的具有巨大细长分支和巨大天线的 Au/Ag NDs 在 785 nm 近红外 (NIR) 激光照射下对染料检测表现出更高的 SERS 活性。同时，相应独特的金属间协同作用可以有效抑制化学活性Ag在高温环境中的氧化。重要的是，在 30 分钟的连续测试中，室温（~25 ℃）下超过 90% 的 SERS 活性可以在高温（~170 ℃）下保持良好。因此，它在未来高温催化反应的原位SERS监测方面具有巨大的潜力。