Figure 5
Schematic (top view and section view) of the evolution of the Ag and Au films as a function of the laser fluence. (a) quartz/SnO2:F substrate (b) quartz/SnO2:F with 7.7 nm thickness of Au and 50 nm thickness of Ag (untreated bilayer). (c) Alloying process of Au/Ag films with laser fluence 0.5 J/cm2 and 12 ns laser pulse duration. (d) Dealloying process of Au/Ag films with laser fluence 0.5 J/cm2 and 12 ns laser pulse duration. (e) Nanoporous Au particles (after HNO3 etch of Au/Ag alloyed) with laser fluence 1.0 J/cm2 and 12 ns laser pulse duration.
