Achiral CdSe quantum dots exhibit optical activity in the visible region upon post-synthetic ligand exchange with D- or L-cysteine.
Semiconductor cadmium selenide (CdSe) quantum dots (QDs) exhibited mirror-image circular dichroism (CD) spectra in the visible region (350-570 nm) after replacing the trioctylphosphine oxide/oleic acid ligands on achiral nanocrystals with D- and L-cysteines. Chiroptical properties of cysteine-capped CdSe QDs depend on their size and can be fine-tuned by changing the radius of QDs.
University of Wyoming, 1000 E. University Avenue, Laramie, WY 82071, USA.
Urice
U
Tohgha
Krisztina
K
Varga
Milan
M
Balaz
D019187:Cadmium Compounds / Q000737:chemistry*; D002942:Circular Dichroism; D003545:Cysteine / Q000737:chemistry*; D008024:Ligands; D015394:Molecular Structure; D019301:Oleic Acid / Q000737:chemistry*; D055620:Optical Phenomena; D009943:Organophosphorus Compounds / Q000737:chemistry; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry*; D012666:Semiconductors; D014466:Ultraviolet Rays
D019187:Cadmium Compounds; D008024:Ligands; D009943:Organophosphorus Compounds; D018036:Selenium Compounds; D019301:Oleic Acid; C044965:trioctyl phosphine oxide; C058667:cadmium selenide; D003545:Cysteine