The development of surface-enhanced Raman scattering (SERS) devices for detection of trace pesticides has attracted more and more attention. In this work, a large-area self-assembly approach assisted with reactive ion etching (RIE) is proposed for preparing SERS devices consisting of Ag-covered “hedgehog-like” nanosphere arrays (Ag/HLNAs). Such a SERS device has an enhancement factor of 2.79×107, a limit of detection (LOD) up to 10−12M for Rhodamine 6G (R6G) analytes, and a relative standard deviation (RSD) smaller than 10%, demonstrating high uniformity. Besides, for pesticide detections, the device achieves an LOD of 10−8M for thiram molecules. It indicates that the proposed SERS device has a promising opportunity in detecting toxic organic pesticides.

中文翻译：

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带有“刺猬状”纳米球阵列的 SERS 设备用于检测痕量农药

用于检测痕量农药的表面增强拉曼散射（SERS）装置的开发越来越受到关注。在这项工作中，提出了一种辅助反应离子蚀刻（RIE）的大面积自组装方法，用于制备由银覆盖的“刺猬状”纳米球阵列（Ag/HLNA）组成的 SERS 器件。这种 SERS 装置的增强因子为2.79×107, 检测限 (LOD) 高达 10-12M 代表罗丹明 6G (R6G) 分析物，相对标准偏差 (RSD) 小于 10%，表明均一性高。此外，对于农药检测，该设备实现了 10 的 LOD-8M 为福美双分子。这表明所提出的 SERS 装置在检测有毒有机农药方面具有广阔的前景。