Aligned TiO2 nanorod arrays decorated with closely interconnected Au/Ag nanoparticles: Near-infrared SERS active sensor for monitoring of antibiotic molecules in water
Aligned TiO2 nanorod arrays decorated with closely interconnected Au/Ag nanoparticles: Near-infrared SERS active sensor for monitoring of antibiotic molecules in water
复制标题
用紧密互连的金/银纳米颗粒装饰的对齐 TiO2 纳米棒阵列：用于监测水中抗生素分子的近红外 SERS 主动传感器
DOI：
10.1016/j.snb.2021.130848
复制
发表时间：
2021-10-06
影响因子：
8.4
通讯作者：
Chen, Ming
中科院分区：
文献类型：
--
作者：
Jiao, Anxin;Cui, Qingqiang;Chen, Ming
近红外（NIR）激发的表面增强拉曼散射（Sers）光谱比传统的紫外（UV）或可见光激发具有更吸引人的多重特征。在此，我们展示了一个有趣的和高活性的混合荧光灯为基础的近红外表面增强拉曼光谱传感器，通过良好的排列TiO 2纳米棒阵列（NRA）装饰与纳米Au/Ag纳米粒子（NPs）。所制备的Au/Ag NPs-TiO 2 NRA在400-1300 nm范围内具有较强的吸收能力，其近红外表面增强拉曼活性显著高于单金属Au或Ag负载于TiO 2 NRA的近红外表面增强拉曼活性。该传感器可用于实际水样中抗生素环丙沙星和氯霉素的超灵敏检测，检测限分别为10（-9）M和10（-8）M。有趣的是，上级优于现有的裸金属纳米基底，具有独特的异质结构的Au/Ag NPs-TiO 2 NRA也可以作为可重复使用的NIR-SERS传感器，由于其优异的光催化降解能力，并且在5次循环测试后可以保持类似于84.2%的残留Sers活性。因此，人们认为，建立多功能NIR-SERS传感器具有更大的潜力，在许多特定的应用程序中的各种生物分子的超灵敏监测。
Near-infrared (NIR) excited surface-enhanced Raman scattering (SERS) spectroscopy is expected to have more appealing multiple-features than that of traditional ultraviolet (UV) or visible light excitation. Herein, we demonstrate an interesting and highly active hybrid semiconductor-based NIR-SERS sensor via well-aligned TiO2 nanorod arrays (NRAs) decorated with bimetallic Au/Ag nanoparticles (NPs). The obtained Au/Ag NPs-TiO2 NRAs with a stronger absorption capacity in 400-1300 nm region exhibit a remarkable higher NIR-SERS activity than that of monometallic Au or Ag loaded on TiO2 NRAs. Then, the established NIR-SERS sensor can provide ultrasensitive 785 nm laser excited-SERS detection of antibiotic ciprofloxacin and chloramphenicol in real-world water samples with detection limits as low as 10(-9) M and 10(-8) M, respectively. Interestingly, superior to the present bare metallic nanosubstrates, the Au/Ag NPs-TiO2 NRAs with unique heterostructures can also be served as reusable NIR-SERS sensor due to its excellent photocatalytic degradation ability, and similar to 84.2% residual SERS activity can be maintained after 5 recycling tests. Therefore, it is believed that the established multifunctional NIR-SERS sensor holds greater potential for ultrasensitive monitoring of diverse biomolecules in many specific applications.