Calvo-Lozano Olalla, Hernández-López Laura, Gomez Leyre, Carné-Sánchez Arnau, von Baeckmann Cornelia, Lechuga Laura M, Maspoch Daniel
Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, CIBER-BNN, and Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra, Barcelona, Spain.
Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra, Barcelona, Spain.
ACS Appl Mater Interfaces. 2023 Aug 23;15(33):39523-39529. doi: 10.1021/acsami.3c07213. Epub 2023 Aug 11.
The grave health and environmental consequences of water pollution demand new tools, including new sensing technologies, for the immediate detection of contaminants in situ. Herein, we report the integration of metal-organic cages or polyhedra (MOCs/MOPs) within a nanophotonic sensor for the rapid, direct, and real-time detection of small (<500 Da) pollutant molecules in water. The sensor, a bimodal waveguide silicon interferometer incorporating Rh(II)-based MOPs as specific chemical receptors, does not require sample pretreatment and enables minimal expenditure of time and reagents. We validated our sensor for the detection of two common pollutants: the industrial corrosion inhibitor 1,2,3-benzotriazole (BTA) and the systemic insecticide imidacloprid (IMD). The sensor offers a fast time-to-result response (15 min), high sensitivity, and high accuracy. The limit of detection (LOD) in tap water for BTA is 0.068 μg/mL and for IMD, 0.107 μg/mL, both of which are below the corresponding toxicity thresholds defined by the European Chemicals Agency (ECHA). By combining innovative chemical molecular receptors such as MOPs with state-of-the-art photonic sensing technologies, our research opens the path to implement competitive sensor devices for in situ environmental monitoring.
水污染对健康和环境造成的严重后果需要新的工具，包括新的传感技术，以便能够即时原位检测污染物。在此，我们报告了一种纳米光子传感器，该传感器集成了金属有机笼或多面体（MOCs/MOPs），用于快速、直接和实时检测水中的小分子（<500 Da）污染物。该传感器是一种双峰波导硅干涉仪，将基于Rh(II)的MOPs作为特定的化学受体，无需对样品进行预处理，且能将时间和试剂的消耗降至最低。我们验证了该传感器对两种常见污染物的检测能力：工业腐蚀抑制剂1,2,3-苯并三唑（BTA）和系统性杀虫剂吡虫啉（IMD）。该传感器响应快速（15分钟），灵敏度高，准确性高。自来水中BTA的检测限为0.068 μg/mL，IMD的检测限为0.107 μg/mL，均低于欧洲化学品管理局（ECHA）规定的相应毒性阈值。通过将MOPs等创新化学分子受体与先进的光子传感技术相结合，我们的研究为实现用于原位环境监测的竞争性传感器设备开辟了道路。
