Concepedia

Symmetry breaking in ligand-protected gold clusters probed by nonlinear optics

Nick Van Steerteghem, Stijn Van Cleuvenbergen, S. Deckers, Chanaka Kumara, Amala Dass, Hannu Häkkinen, Koen Clays, Thierry Verbiest, Stefan Knoppe

Nanoscale · 2016 · 35 citations · 28 references

DOI

Concepts

Abstract

The first hyperpolarizabilities of [Au25(SR)18](-1/0) and Au38(SR)24 clusters were determined by Hyper-Rayleigh Scattering. A strong dependence on the molecular symmetry was observed, and we explore two strategies to destroy the center of inversion in [Au25(SR)18](-1/0), protection by chiral ligands and alloying of the cluster with silver. This may open new avenues to applications of Au : SR clusters in second-order nonlinear optics.

References

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