Figure 6: (a) Optical absorption spectrum of solid Si film. (e) Absorption of Ag deposited nanowires film on Si substrate with etching time 45 min with 0.02 M AgNO3. (f) Absorption data for Ag deposited nanowires film on Si substrate with etching time 60 min having concentration 0.02 M of AgNO3. (g) Absorption measurement for Ag treated Si substrate with etching time 75 min concentration of 0.02 M AgNO3.