Hydrophilization of CdZnSeS/ZnS alloyed quantum dots using mercaptoethanol
Strokin Pavel, Saratov State University,
Daniil Drozd, Saratov State University,
Irina Goryacheva, Saratov State University.
Abstract
Quantum dots (QDs) are the semiconductor materials based luminescent nanocrystals, which applicable in various fields of science and technology. The main advantages of alloyed QDs are the narrow emission peak and one-step synthesis. The colloidal solutions of alloyed QDs studied to a lesser extent, so the study of colloidal solutions of this QDs type remains relevant for the analytical applications. A lot of modern analytical applications intended to analyze aqueous solutions, so the key requirement for QDs in this case is hydrophilicity. The already known number of QDs synthesis methods in a polar environment, but the nanostructures obtained by these methods are inferior in a number of properties to QDs synthesized via the high-temperature organometallic way. Hydrophilization is a method of transfer QDs into a polar solution, which able to preserve the advantages of initially hydrophobic QDs. In this work, we present the results of the hydrophilization of CdZnSeS / ZnS alloyed QDs by replacing the initial ligands (trioctylphosphine sulfide) with a combination of dihydrolipoic acid and mercaptoethanol. The influence of mercaptoethanol as an additional hydrophilizing agent on the optical properties of QDs such as quantum yield, luminescence peak position, and peak width was investigated. The colloidal stability of the samples during long-term storage was observed. This work was supported by Russian Science Foundation, project 20-13-00195.
Speaker
Strokin Pavel
Saratov State University
Russia
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