Figure 1From: Fabrication and evolution of multilayer silver nanofilms for surface-enhanced Raman scattering sensing of arsenate SEM images of AgNPs multilayer films on glass slides prepared in a AgNO 3 /BuNH 2 (5/2.5 mM) ethanolic solution with different reaction times: (a) 1.5 h, (b) 2 h, (c) 5 h, (d) 18 h, (e) 25 h, and (f) 40 h.Back to article page