INVESTIGATION OF THE POSSIBILITY OF LABELLING OF BULK MATERIAL BY QUANTUM DOTS
Rubrics: 1. CHEMISTRY
Authors:
1.
KNITU; KNRTU
2.
Kazan National Research Technological University
3.
Kazan National Research Technological University
Russian Federation
Russian Federation
Type:
Article
Pages:
from 5
to 8
Status:
In work
Received:
04.05.2025
Accepted:
04.05.2025
Published:
04.05.2025
Language:
Russian
Keywords:
POWDER, QUANTUM DOTS, FLOWABILITY, LUMINESCENCE, LABELING
Abstract (English):
This work is devoted to finding methods for labelling powder materials. The labeling was performed with CdSe/CdS/ZnS quantum dots synthesized in an oleic acid medium. Cyanuric acid powder was selected as a bulk material model for the study. The choice of cyanuric acid as a model powder material was justified by its low toxicity, relative cheapness and accessibility, as well as insolubility in a number of organic solvents used for the quantum dots synthesis. Also, the criterion for choosing cyanuric acid was that its own luminescence spectrum was shifted relative to the spectra of the quantum dots selected for the study. The solubility of cyanuric acid in organic solvents used for the synthesis of quantum dots was evaluated; the flowability of the powder and the effect of exposure to solvents on it were analyzed. Samples of cyanuric acid powder marked with quantum dots with different positions and luminescence intensity were obtained. The luminescent properties of the obtained powders were investigated, the minimum amount of powder with quantum dots applied to the surface in the total composition sufficient for labeling was estimated, and the effect of applying quantum dots to the surface on the flowability of the powder was estimated. The possibility of marking bulk material with compositions of quantum dots with clearly defined monochromatic bands of luminescence radiation to create an invisible "fingerprint", which is determined in laboratory conditions, is investigated.
This work is devoted to finding methods for labelling powder materials. The labeling was performed with CdSe/CdS/ZnS quantum dots synthesized in an oleic acid medium. Cyanuric acid powder was selected as a bulk material model for the study. The choice of cyanuric acid as a model powder material was justified by its low toxicity, relative cheapness and accessibility, as well as insolubility in a number of organic solvents used for the quantum dots synthesis. Also, the criterion for choosing cyanuric acid was that its own luminescence spectrum was shifted relative to the spectra of the quantum dots selected for the study. The solubility of cyanuric acid in organic solvents used for the synthesis of quantum dots was evaluated; the flowability of the powder and the effect of exposure to solvents on it were analyzed. Samples of cyanuric acid powder marked with quantum dots with different positions and luminescence intensity were obtained. The luminescent properties of the obtained powders were investigated, the minimum amount of powder with quantum dots applied to the surface in the total composition sufficient for labeling was estimated, and the effect of applying quantum dots to the surface on the flowability of the powder was estimated. The possibility of marking bulk material with compositions of quantum dots with clearly defined monochromatic bands of luminescence radiation to create an invisible "fingerprint", which is determined in laboratory conditions, is investigated.
Keywords:
POWDER, QUANTUM DOTS, FLOWABILITY, LUMINESCENCE, LABELING
POWDER, QUANTUM DOTS, FLOWABILITY, LUMINESCENCE, LABELING
