Circular Dichroism Simulated Spectra of Chiral Gold Nanoclusters:  A Dipole Approximation

Abstract

Circular dichroism (CD) spectra of chiral bare and thiol-passivated gold nanoclusters have been calculated within the dipole approximation. The calculated CD spectra show features that allow us to distinguish between clusters with different indexes of chirality. The main factor responsible of the differences in the CD lineshapes is the distribution of interatomic distances that characterize the chiral cluster geometry. These results provide theoretical support for the quantification of chirality and its measurement, using the CD lineshapes of chiral metal nanoclusters.

Fluxionality of gold nanoparticles investigated by Born-Oppenheimer molecular dynamics

“…Also this topology is cage-like as the previous one, but it loses symmetry and drops to point group C 1 being therefore chiral. Chirality seems a frequently occurring phenomenon for gold clusters and has been observed by several researchers [82][83][84][85][86][87][88][89][90]. (Table I).…”

From individual to collective chirality in metal nanoparticles

“…[111]); (b) a nanoparticle (helix inspired from Ref. [113]); (c) a collection of nanoparticles (helix inspired from Ref.…”

Optical circular dichroism of single-wall carbon nanotubes

“…This approximation has been recently used to study the optical response of chiral gold nanoclusters 24 , as well as the electron energy loss spectra of SWNTs 25,26 and fullerenes.…”