Quantum dots luminescent compounds with multimodal luminescence for fuel labeling

Abstract

The article considers the possibility of labelling oil products using luminescent ‘fingerprints’ based on several types of quantum dots to protect fuel from falsification. For the synthesis of quantum dots, a scalable universal method was proposed using an available large-producible solvent and a stabilizer, oleic acid. Using the developed technique, quantum dots were obtained that luminescence in the entire visible range of the electromagnetic radiation spectrum. The formation of nanoparticles was confirmed by a set of instrumental research methods. The determination of the presence of quantum dots in the composition of an oil product was proposed using spectrofluorometry with no additional separation or dialization of nanoparticles from the sample. Using normal regular gasoline as an example, the effect of fuel on the luminescence of quantum dots and their aggregation was studied. The interaction of different types of quantum dots in the composition of the indicator and their influence on each other’s luminescence in solvent and gasoline were analyzed. The minimum detectable by the spectrofluorometric method concentrations of quantum dots in normal gasoline and the optimal proportions of quantum dots of various types in mixtures were determined.