Luo Yan, Zhai Binbin, Li Min, Zhou Wenjingli, Yang Jinglun, Shu Yuanhong, Fang Yu
Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR 999077, China.
J Colloid Interface Sci. 2024 Apr 15;660:513-521. doi: 10.1016/j.jcis.2024.01.068. Epub 2024 Jan 13.
Wearable SERS substrates have gained substantial attention for health monitoring and other applications. Current designs often rely on conventional polymer substrates, leading to discomfort and complexity due to the need of additional adhesive layers. To address the issues, we fabricate a flexible, uniform, ultrathin, transparent and porous SERS substrate via depositing Ag nanoparticles (AgNPs) onto the CdS nanowires (CdSNWs) grown on the surface of a prepared nanofilm (AgNPs-CdSNWs/nanofilm). Unlike the wearable SERS substrates reported in literature, the one presented in this work is self-adhesive to a variety of surfaces, which simplifies structure, enhances comfort and improves performance. Importantly, the new SERS substrate as developed is highly stable and reusable. Artificial sample tests revealed that the substrate showed a great enhancement factor (EF) of 4.2 × 10 and achieved a remarkable detection limit (DL) of 1.0 × 10 M for rhodamine 6G (R6G), which are among the highest records observed in wearable SERS substrates reported in literature. Moreover, the substrate enables at real-time and in-situ reliable monitoring of urea dynamics in human sweat and plant leaves, indicating its applicability for health analysis and in precision agriculture.
可穿戴表面增强拉曼散射（SERS）基底在健康监测及其他应用领域已备受关注。当前的设计通常依赖传统聚合物基底，由于需要额外的粘附层，导致使用起来不舒适且结构复杂。为解决这些问题，我们通过将银纳米颗粒（AgNPs）沉积在生长于预制纳米薄膜表面的硫化镉纳米线（CdSNWs）上，制备了一种柔性、均匀、超薄、透明且多孔的SERS基底（AgNPs-CdSNWs/纳米薄膜）。与文献中报道的可穿戴SERS基底不同，本文所展示的这种基底能自粘于多种表面，这简化了结构，提升了舒适度并改善了性能。重要的是，新开发的SERS基底具有高度稳定性且可重复使用。人工样品测试表明，该基底对罗丹明6G（R6G）显示出高达4.2×10的增强因子（EF），并实现了1.0×10 M的显著检测限（DL），这是文献中报道的可穿戴SERS基底中观测到的最高记录之一。此外，该基底能够实时、原位可靠地监测人体汗液和植物叶片中的尿素动态，表明其在健康分析和精准农业中的适用性。
