Li Muhua, Liu Yanqi, Liu Xuan, Zhang Yongzhi, Zhu Tiying, Feng Chao, Zhao Yan
Institute of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China.
Institute of Laser Engineering, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China; Key Laboratory of Trans-scale Laser Manufacturing Technology (Beijing University of Technology), Ministry of Education, Beijing 100124, China; Beijing Engineering Research Center of Laser Technology, Beijing University of Technology, Beijing 100124, China; Beijing Colleges and Universities Engineering Research Center of Advanced Laser Manufacturing, Beijing 100124, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2022 Jul 5;275:121159. doi: 10.1016/j.saa.2022.121159. Epub 2022 Mar 15.
Surface-enhanced Raman spectroscopy (SERS) is an ultra-sensitive analytical tool that can effectively detect and identify molecules by their unique vibrational fingerprints. Development of SERS substrates with good stability, high sensitivity and reproducibility is still a big challenge in practical applications. Recently, 2D materials/metallic hybrid SERS substrates provide a new prospect to improve the SERS performance. Here, we obtain a monolayer MoS covered silver nanoparticle (AgNP) array as a high-performance SERS substrate. Annealing temperature-dependent SERS signals on the hybrid substrate have been explored. The optimum SERS performance was obtained at 290 ℃ (the detection limit of 10 M for Rhodamine 6G and the corresponding SERS enhancement factor of 8.3 × 10), which is attributed to the better contact between AgNPs and MoS and the uniform AgNPs with appropriate particle sizes. The prepared MoS/AgNPs hybrid substrates also have been utilized to detect various molecules, which demonstrates a great potential for applications in food safety and biochemical environmental detection.
表面增强拉曼光谱（SERS）是一种超灵敏的分析工具，它可以通过分子独特的振动指纹有效地检测和识别分子。在实际应用中，开发具有良好稳定性、高灵敏度和可重复性的SERS基底仍然是一个巨大的挑战。近年来，二维材料/金属混合SERS基底为提高SERS性能提供了新的前景。在此，我们制备了一种单层MoS覆盖的银纳米颗粒（AgNP）阵列作为高性能SERS基底。研究了混合基底上与退火温度相关的SERS信号。在290℃时获得了最佳的SERS性能（罗丹明6G的检测限为10 M，相应的SERS增强因子为8.3×10），这归因于AgNP与MoS之间更好的接触以及具有合适粒径的均匀AgNP。所制备的MoS/AgNPs混合基底也已用于检测各种分子，这表明其在食品安全和生化环境检测方面具有巨大的应用潜力。
