Self-assembled two-dimensional superlattice of Au–Ag alloy nanocrystals

Abstract

The self-assembled two-dimensional superlattice of octanthiol-passivated Au–Ag alloy nanoparticles is reported in this letter. These nanoparticles show good composition-tunable properties. In the UV-visible spectra, the absorption peaks shifted linearly from the high-energy to the lower-energy side with increasing molar faction of Au.