Radhakrishnan K, Suriyaprakash R, Priya L Srimathi, Saravanan P, Alam Mir Waqas, Rosaiah Pitcheri, Nunna Guru Prakash, Ko Tae Jo
Department of Chemistry, Centre for Material Chemistry, Karpagam Academy of Higher Education, Coimbatore, Tamil Nadu, 641021, India.
Centre for Research in Environment, Sustainability Advocacy and Climate Change (REACH), Directorate of Research, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, 603203, India.
J Fluoresc. 2025 Jan 9. doi: 10.1007/s10895-024-04095-9.
An eco-friendly nitrogen-passivated carbon dot (N-CDs)-based fluorescent sensor was designed for the selective and sensitive detection of thiophanate-methyl, a widely applied fungicide in agriculture. The synthesized N-CDs exhibited robust fluorescence and remarkable photostability, which contributed to the sensor's performance. Notably, the sensor achieved a detection limit as low as 4.8 nM and operated effectively over a wide linear dynamic range of 10 to 150 µM, showcasing its potential for precise thiophanate-methyl detection. Optimization of the experimental parameters, including pH and concentration of N-CDs, resulted in a very efficient sensing platform with rapid response time and good selectivity towards common interferents such as other pesticides and metal ions. Moreover, the sensor was successfully deployed for real agricultural samples enabling a high recovery for accurate detection of thiophanate-methyl residues. The N-CDs-based sensors may serve as sustainable cost-effective methods for monitoring pesticide contamination in foodstuffs or environmental matrices. The sensor stands out as be practical benefit, eco-friendly tool for food safety assurance and environmental protection.
设计了一种基于环保型氮掺杂碳点（N-CDs）的荧光传感器，用于选择性和灵敏地检测甲基硫菌灵，这是一种在农业中广泛应用的杀菌剂。合成的N-CDs表现出强荧光和显著的光稳定性，这有助于传感器的性能。值得注意的是，该传感器的检测限低至4.8 nM，在10至150 µM的宽线性动态范围内有效运行，展示了其精确检测甲基硫菌灵的潜力。对包括pH值和N-CDs浓度在内的实验参数进行优化，得到了一个非常高效的传感平台，该平台具有快速响应时间，并且对其他农药和金属离子等常见干扰物具有良好的选择性。此外，该传感器已成功应用于实际农业样品，能够实现对甲基硫菌灵残留的准确检测，回收率高。基于N-CDs的传感器可作为监测食品或环境基质中农药污染的可持续且经济高效的方法。该传感器作为一种具有实际益处的环保工具，在食品安全保障和环境保护方面脱颖而出。
