Searching for Alternative Plasmonic Materials for Specific Applications

Table 1

Electron density and plasma frequency values of Au, Ag and Cu noble nanoparticles.

Noble metal	Electron density (10^22/cm^3)	Plasma frequency (10^16 Hz)
Gold (Au)	5.90	1.40
Silver (Ag)	5.86	1.39
Copper (Cu)	8.47	1.64