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SERS Effect Investigation Based on Rose

来源：花匠小妙招时间：2026-05-27 02:04

基于玫瑰花状MoS2@Au复合材料的SERS效应研究

SERS Effect Investigation Based on Rose-Shaped MoS2@Au Composite Materials

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本文通过水热法合成了玫瑰花状的MoS2纳米粒子，结合氧化还原法制备了MoS2@Au复合材料，并将其作为表面增强拉曼散射(SERS)的活性基底。利用扫描电子显微镜、透射电子显微镜、X射线衍射仪以及拉曼光谱仪分别对MoS2和MoS2@Au复合材料进行表征。以罗丹明6G (R6G)作为探针分子，对MoS2和MoS2@Au两种材料的SERS性能进行研究。SERS结果表明在532 nm激光线的激发下，相比于MoS2对R6G分子的检测极限为5×10-6 M，MoS2@Au复合材料的检测极限高达5 QUOTE 10-9 M，明显提高了3个数量级，这得益于Au纳米粒子的电磁场增强与基底-分子间电荷转移增强的协同作用。并计算得到基底的SERS信号相对标准偏差(RSD)值为12.2%，表明MoS2@Au基底的SERS信号具有较好的均匀性。

Abstract

Rose-shaped MoS2 nanoparticles (NPs) were synthesized by hydrothermal method, and the MoS2@Au nano-composites (NCs) were prepared by oxidation-reduction method, which were used as the surface enhanced Raman scattering (SERS) active substrates. Scanning electron microscope, transmission electron microscope, X-ray diffractometer and Raman spectrometer were used to characterize the structure performance of MoS2@Au NCs. We applied Rhodamine 6G (R6G) as the probe molecules, the SERS properties of the MoS2 NPs and MoS2@Au NCs were studied. The results show that under the excitation of 532 nm laser, the detection concentration limit of R6G is 10-6 M when MoS2 NPs is used as the substrate. After the modification of Au NPs, the detection limit can be reached 10-9 M. It is obviously improved by 3 orders of magnitude, which is due to the enhancement of electromagnetic field of Au nanoparticles and the enhancement of charge transfer between substrate and molecule to promote the improvement of SERS performance. Furthermore, the relative standard deviation (RSD) of the SERS signal of MoS2@Au substrate was calculated to be 12.2%, this indicates that the SERS signal of the MoS2@Au substrate has good uniformity.

关键词

玫瑰花状的MoS2 /SERS /电荷转移 /电磁场增强{{custom_keyword}} /

Key words

rose-shaped MoS2@Au /SERS /charge transfer /electromagnetic field enhancement{{custom_keyword}} /

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于鸿艳, 陈丹瑜, 孙欢欢, 宋燕平.基于玫瑰花状MoS2@Au复合材料的SERS效应研究. 光散射学报. 2023, 35(1): 8-15 https://doi.org/10.13883/j.issn1004-5929.202301002

YU Hongyan, CHEN Danyu, SUN Huanhuan, SONG Yanping.SERS Effect Investigation Based on Rose-Shaped MoS2@Au Composite Materials. Chinese Journal of Light Scattering. 2023, 35(1): 8-15 https://doi.org/10.13883/j.issn1004-5929.202301002