Flexible surface-enhanced Raman scattering (SERS) substrates offer advantages over traditional rigid substrates for efficient extraction of target molecules from complex surfaces, which is critical for technical applications ranging from pesticide residue analysis to environmental pollutant monitoring and forensic science detection. Herein, flexible sandwich-structured silver nanowires with laser-induced graphene and polydimethylsiloxane (PDMS) (Ag NWs@LIG@PDMS) with high SERS activity, flexibility, and stability were prepared by a simple method. Its detection limit is as high as 10^–14 M, which is significantly higher than that of silver nanowires embedded in PDMS (Ag NWs/PDMS) and silver nanowire adhesive PDMS (Ag NWs@PDMS) with bilayer structure, due to the efficacy of interlayer laser-induced graphene (LIG). Moreover, compared with similar structures, the sophisticated structural design of silver nanowires with laser-induced graphene embedded in PDMS (Ag NWs/LIG@PDMS) enables higher SERS activity. Apart from this, the Ag NWs@LIG@PDMS film maintains excellent SERS performance even under 10% tensile deformation and extreme operating temperature (−80 to 80 °C). In view of the above-mentioned advantages, SERS substrates have been successfully used for fast, efficient, low-cost, and nondestructive extraction and detection of peel surface and fingerprint residues in real scenes, providing avenues for molecular trace extraction and detection in food safety and forensics science.

中文翻译：

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具有银纳米线和激光诱导石墨烯的灵活且高度灵敏的三明治结构 PDMS，用于快速残留检测

柔性表面增强拉曼散射 (SERS) 基板与传统刚性基板相比具有优势，可从复杂表面有效提取目标分子，这对于从农药残留分析到环境污染物监测和法医学检测等技术应用至关重要。在此，通过简单的方法制备了具有高 SERS 活性、柔韧性和稳定性的激光诱导石墨烯和聚二甲基硅氧烷 (PDMS) (Ag NWs@LIG@PDMS) 的柔性夹层结构银纳米线。检出限高达^10-14由于层间激光诱导石墨烯 (LIG) 的功效，M 显着高于嵌入 PDMS 的银纳米线（Ag NWs/PDMS）和具有双层结构的银纳米线粘合剂 PDMS（Ag NWs@PDMS）。此外，与类似结构相比，嵌入 PDMS（Ag NWs/LIG@PDMS）的激光诱导石墨烯银纳米线的复杂结构设计可实现更高的 SERS 活性。除此之外，Ag NWs@LIG@PDMS 薄膜即使在 10% 的拉伸变形和极端工作温度（-80 至 80 °C）下也能保持出色的 SERS 性能。鉴于上述优势，SERS基底已成功用于真实场景中果皮表面和指纹残留的快速、高效、低成本、无损提取和检测，