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Research on the rapid identification of light green SF using a red-emitting CdTe quantum dot fluorescent sensor

KUIYU YI1,* , QIFENG ZHAO1

Affiliation

  1. School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, Liaoning 111003, People's Republic of China

Abstract

The study presents a groundbreaking approach to address the pressing issue of ecological contamination caused by Light Green SF (LGSF), a widely used dye that poses significant hazards to aquatic ecosystems. In recognition of the pressing need for a rapid and sensitive method to detect this contaminant, researchers have innovatively developed a highly specialized red-emitting CdTe quantum dot (QDs) fluorescent sensor, specifically designed for the rapid identification of light green SF (LGSF) in aquatic environments. By leveraging fluorescence resonance energy transfer (FRET), a phenomenon where energy is non-radiatively transferred from an excited donor molecule to an acceptor molecule, the researchers found that LGSF acts as an efficient quencher of the CdTe QDs' fluorescence. This quenching effect occurs rapidly and specifically upon the presence of LGSF, enabling the swift and selective detection of the dye in aquatic environments. The study delves deeper into the intricate quenching mechanism, providing valuable insights into the molecular interactions between LGSF and the CdTe QDs. Notably, this is the first investigation to employ QDs for the quantitative assessment of LGSF in lake water, demonstrating the exceptional selectivity and sensitivity of CdTe QDs in this application. Our findings underscore the sensor's potential as a formidable tool for safeguarding aquatic ecosystems from LGSF contamination..

Keywords

CdTe quantum dots, Fluorescent sensor, Light green SF, Detection mechanism, Environmental monitoring.

Submitted at: Jan. 15, 2025
Accepted at: June 4, 2025

Citation

KUIYU YI, QIFENG ZHAO, Research on the rapid identification of light green SF using a red-emitting CdTe quantum dot fluorescent sensor, Journal of Optoelectronics and Advanced Materials Vol. 27, Iss. 5-6, pp. 212-218 (2025)