Fig. 1: Atomic structures and absorption cross sections.
From: Hot carriers from intra- and interband transitions in gold-silver alloy nanoparticles
a Atomic structures of spherical Au-Ag alloy nanoparticles of 20 nm diameter for Au fractions ranging from xAu = 0.0 (top left) to xAu = 1.0 (bottom right) in steps of ΔxAu = 0.2. Au atoms are yellow and Ag atoms are grey. b Absorption cross sections of spherical Au-Ag alloy nanoparticles of 20 nm diameter as a function of the NP composition. The solar irradiance (AM1.5 spectrum, credit to U.S. Department of Energy (DOE)/NREL/ALLIANCE) as a function of photon energy is shown in black with the visible region shaded in blue. The cross sections were calculated using the quasistatic approximation with experimentally measured bulk dielectric functions, see Methods section.
