Assembly of mesoscale helices with near-unity enantiomeric excess and light-matter interactions for chiral semiconductors.

ABSTRACT: Semiconductors with chiral geometries at the nanoscale and mesoscale provide a rich materials platform for polarization optics, photocatalysis, and biomimetics. Unlike metallic and organic optical materials, the relationship between the geometry of chiral semiconductors and their chiroptical properties remains, however, vague. Homochiral ensembles of semiconductor helices with defined geometries open the road to understanding complex relationships between geometrical parameters and chiroptical properties of semiconductor materials. We show that semiconductor helices can be prepared with an absolute yield of ca 0.1% and an enantiomeric excess (e.e.) of 98% or above from cysteine-stabilized cadmium telluride nanoparticles (CdTe NPs) dispersed in methanol. This high e.e. for a spontane

SUBMITTER: Feng W 

PROVIDER: S-EPMC5332156 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature