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Solvent effect on chiroptical properties of chiral atomically thin CdSe nanoplatelets capped with enantiomeric ligandsстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Kurtina Daria A., Long Hui, Chang Shuai, Vasiliev Roman B.
- Журнал: Optical Materials
- Том: 158
- Год издания: 2025
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Номер статьи: 116483
- DOI: 10.1016/j.optmat.2024.116483
- Аннотация: Chiral semiconductor nanostructures have growing interest due to applications in enantioselective catalyst andseparation, chiral sensing, photonics and spintronics. Here, we have studied solvent effect on the optical andchiroptical properties of atomically thin 2 and 3 monolayers (0.6 and 0.9 nm) thick CdSe nanoplatelets (NPLs)grown by a colloidal method and capped with chiral N-acetyl-L-cysteine ligand. An analysis of the dependence ofcircular dichroism on the dielectric constants of organic solvents demonstrates an order-of-magnitude increase inthe dissymmetry factor for heavy-hole (HH) and light-hole (LH) excitons with a decrease in the dielectric constantof the solvent achieving 2‧10 2 for the thinnest 2 ML NPLs. It was supplemented by a change in thecontributions of HH and LH excitons to the absorption spectra and variation in the spectral position of excitons,which can be explained by the effect of dielectric screening of 2D excitons. Our study demonstrates approaches tocontrol the rotational strength of 2D excitons in chiral semiconductor NPLs simply by changing the surroundingenvironment, which is important for chiroptical applications.
- Добавил в систему: Васильев Роман Борисович
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