Noureena M M, Puhazhendhi Arulmozhi, Sivalingam Soumya, Anu A S, Vinod Kumar N, Rithesh Raj D
Department of Electronics, School of Electrical and Electronics Engineering, SASTRA deemed to be University, Thanjavur 613401, India.
School of Chemical and Biotechnology, SASTRA deemed to be University, Thanjavur 613401, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2025 Mar 15;329:125625. doi: 10.1016/j.saa.2024.125625. Epub 2024 Dec 20.
Development of a rapid and sensitive detection method for hazardous dyes attracts considerable research interest. In this work, L-Tryptophan-based Carbon dots were developed as a fluorescence sensor for the detection of Malachite green (MG). Green fluorescent L-Trp-C-dots were synthesized by a simple pyrolysis technique using L-Trp as the starting precursor. L-Trp-C-dots exhibited different quenching responses to MG, and other interfering species, consequently offering a selective strategy to detect MG. The proposed sensor shows a limit of detection (LOD) of 0.06 μM and a limit of quantification (LOQ) of 0.22 μM with in the linearity range of 0 to 60 µM concentration. Additionally, the relative standard deviation (RSD) was found to be below 1.7 %. Furthermore, the recovery of MG from the real-time samples (green peas) was investigated.
