Fig. 4
From: Aligned Chemically Etched Silver Nanowire Monolayer as Surface-Enhanced Raman Scattering Substrates
Normalized UV–vis extinction spectra for the as-synthesized and chemically etched Ag nanowire aqueous solution with different amounts of the etching agent. E200, E300, and E400 stand for the chemically etched Ag nanowires etched by 200, 300, and 400 μL etchant, respectively