Albarghouthi Najwan, MacMillan Presley, Brosseau Christa L
Department of Chemistry, Saint Mary's University, 923 Robie St., Halifax, Nova Scotia, Canada.
Analyst. 2021 Mar 21;146(6):2037-2047. doi: 10.1039/d0an02215b. Epub 2021 Feb 3.
Recently, there has been increasing concern over the widespread use of the herbicide atrazine which has been reported to have problematic side effects on local ecosystems. This has highlighted the need for rapid and accurate point-of-need assessment tools for analytical determination of herbicides in ground and surface waters. Surface enhanced Raman spectroscopy (SERS) is a sensitive vibrational spectroscopy technique which has recently been employed for the analysis of a variety of analytes in water, ranging from pharmaceuticals to pesticides. In this work, SERS sensors constructed using gold nanorod (AuNR) arrays are optimized and then utilized for the rapid and sensitive detection of atrazine. In this study, the effect of relative humidity on the self-assembly of gold nanorods into arrays was explored, and the SERS performance was assessed using para-aminothiophenol as a SERS probe. Once the SERS performance of the substrates was deemed optimal, the detection of atrazine was highlighted. This work represents the first time that relative humidity has been explored as an optimization strategy for controlled alignment of gold nanorods for SERS analysis of atrazine.
最近，除草剂阿特拉津的广泛使用引发了越来越多的关注，据报道它对当地生态系统有不良副作用。这凸显了对用于分析地表水和地下水中除草剂的快速、准确的即时需求评估工具的需求。表面增强拉曼光谱（SERS）是一种灵敏的振动光谱技术，最近已被用于分析水中的各种分析物，从药物到农药。在这项工作中，使用金纳米棒（AuNR）阵列构建的SERS传感器经过优化，然后用于快速、灵敏地检测阿特拉津。在本研究中，探索了相对湿度对金纳米棒自组装成阵列的影响，并使用对氨基硫酚作为SERS探针评估了SERS性能。一旦认为基底的SERS性能最佳，就突出了对阿特拉津的检测。这项工作首次探索了相对湿度作为一种优化策略，用于控制金纳米棒的排列以进行阿特拉津的SERS分析。
