Zhang Hao, Sun Dani, Wen Yuhao, Wang Mengyuan, Huang Jingying, Lian Ziru, Li Jinhua
Marine College, Shandong University, Weihai 264209, China.
Coastal Zone Ecological Environment Monitoring Technology and Equipment Shandong Engineering Research Center, Shandong Key Laboratory of Coastal Environmental Processes, Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China.
Biosensors (Basel). 2025 May 20;15(5):329. doi: 10.3390/bios15050329.
Malachite green (MG) is a highly toxic dye commonly used in industries and aquaculture, leading to significant environmental contamination and health hazards. Therefore, sensitive and selective detection of MG in real samples is urgently needed. This study presents the development of a molecularly imprinted surface-enhanced Raman spectroscopy (MI-SERS) plasmonic sensor for the rapid and sensitive detection of MG. The sensor consists of a gold nanostar (Au NS) layer as the SERS substrate and an imprinted polydopamine layer containing specific recognition sites for MG. Taking full advantage of the plasmonic effect of SERS and selective recognition capability of imprinted materials, under optimized conditions, the sensor demonstrated high sensitivity, with a detection limit of 3.5 × 10 mg/L, excellent selectivity against interference from other organic dyes, and robust performance with recoveries of 90.2-114.2% in real seawater samples. The MI-SERS sensor also exhibited good reproducibility, stability, and reusability. These findings suggest that the MI-SERS sensor is a promising tool for real-time monitoring of MG contamination in complicated samples.
孔雀石绿（MG）是一种剧毒染料，常用于工业和水产养殖，会导致严重的环境污染和健康危害。因此，迫切需要对实际样品中的MG进行灵敏且选择性的检测。本研究提出了一种用于快速灵敏检测MG的分子印迹表面增强拉曼光谱（MI-SERS）等离子体传感器。该传感器由作为SERS基底的金纳米星（Au NS）层和含有MG特异性识别位点的印迹聚多巴胺层组成。充分利用SERS的等离子体效应和印迹材料的选择性识别能力，在优化条件下，该传感器表现出高灵敏度，检测限为3.5×10 mg/L，对其他有机染料的干扰具有优异的选择性，并且在实际海水样品中的回收率为90.2-114.2%，具有良好的性能。MI-SERS传感器还表现出良好的重现性、稳定性和可重复使用性。这些结果表明，MI-SERS传感器是用于实时监测复杂样品中MG污染的有前途的工具。
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