Intense Circular Dichroism and Spin Selectivity in AgBiS₂ Nanocrystals by Chiral Ligand Exchange.

ABSTRACT: Chiral semiconducting nanomaterials offer many potential applications in photodetection, light emission, quantum information, and so on. However, it is difficult to achieve a strong circular dichroism (CD) signal in semiconducting nanocrystals (NCs) due to the complexity of chiral ligand surface engineering and multiple, uncertain mechanisms of chiroptical behavior. Here, a chiral ligand exchange strategy with cysteine on the ternary metal chalcogenide AgBiS₂ NCs is developed, and a strong, long-lasting CD signal in the near-UV region is achieved. By carefully optimizing the ligand concentration, the CD peaks are observed at 260 and 320 nm, respectively, giving insight into the different ligand binding mechanisms influencing the CD signal of AgBiS₂ NCs. Using density-

SUBMITTER: Ding P 

PROVIDER: S-EPMC11681295 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature