Achiral CdSe quantum dots exhibit optical activity in the visible region upon post-synthetic ligand exchange with d- or l-cysteine

• DOI: 10.1039/c3cc37987f
• Publication Date: 2013-01-22T16:41:55Z
• Authors: Urice Tohgha; Krisztina Varga; Milan Balaz
• Keywords: Cadmium selenide; Trioctylphosphine oxide; Selenide; Cadmium oxide

Semiconductor cadmium selenide (CdSe) quantum dots (QDs) exhibited mirror-image circular dichroism (CD) spectra in the visible region (350–570 nm) after replacing trioctylphosphine oxide/oleic acid ligands on achiral nanocrystals with D- and L-cysteines. Chiroptical properties of cysteine-capped CdSe QDs depend their size can be fine-tuned by changing radius QDs.