Surface Plasmon Resonance Sensor Based on Mn2O3/Au Structure for Detecting Monosodium Glutamate

IF 4.3 4区物理与天体物理 Q2 CHEMISTRY, PHYSICAL Plasmonics Pub Date : 2024-05-16 DOI:10.1007/s11468-024-02347-9

Zhimeng Zhao, Yutong Song, Yanpei Xu, Haixing Hao, Yong Jin, Qi Wang

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Abstract

Monosodium glutamate (MSG) is a commonly used seasoning in various culinary applications. However, excessive intake of monosodium glutamate can cause irreversible harm to the human body. Therefore, the detection of monosodium glutamate in food safety cannot be ignored. In this paper, a fast label-free monosodium glutamate sensor based on surface plasmon resonance (SPR) is proposed. Mn₂O₃ is grown on the surface of a gold film using Mn₂O₃/Au as the medium. The detection results found that with the increase of monosodium glutamate concentration, the resonance wave will have an obvious redshift, and the sensitivity can reach 461.71 nm/%. Within the concentration range of 0–25%, the linear fitting between resonance wavelength and refractive index is greater than 0.99, which ensures the detection resolution. The sensor shown in this paper has great potential and prospects in monosodium glutamate detection and food safety with its excellent sensing performance, simple structure, and economic and environmentally friendly detection method.

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基于 Mn2O3/Au 结构的表面等离子体共振传感器用于检测谷氨酸钠

味精（MSG）是各种烹饪应用中常用的调味料。然而，过量摄入味精会对人体造成不可逆的伤害。因此，味精在食品安全中的检测不容忽视。提出了一种基于表面等离子体共振（SPR）的快速无标签味精传感器。以Mn2O3/Au为介质在金膜表面生长Mn2O3。检测结果发现，随着味精浓度的增加，共振波会发生明显的红移，灵敏度可达461.71 nm/%。在0-25%的浓度范围内，共振波长与折射率的线性拟合大于0.99，保证了检测分辨率。本文所展示的传感器具有传感性能优异、结构简单、检测方法经济环保等优点，在味精检测和食品安全领域具有很大的潜力和前景。

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来源期刊

Plasmonics 工程技术-材料科学：综合

CiteScore

5.90

自引率

6.70%

发文量

164

审稿时长

2.1 months

期刊介绍： Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons. Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.