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Fabrication and evolution of multilayer silver nanofilms for surface enhanced Raman scattering sensing of arsenate

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Academic year: 2020

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Figure

Figure 1 SEM images of AgNPs multilayer films on glass slides prepared in a AgNOdifferent reaction times3/BuNH2 (5/2.5 mM) ethanolic solution with: (a) 1.5 h, (b) 2 h, (c) 5 h, (d) 18 h, (e) 25 h, and (f) 40 h.
Figure 2 UV-Vis absorption spectra of the AgNPs films prepared in AgNOreactants concentrations:3/BuNH2 ethanolic solutions at different reaction time
Table 2 The maximum lmax, valley lmax, maximum peak height of 780 cm-1 band and the corresponding reaction timeneeded them to reach for the three reaction systems
Figure 4 Typical SERS spectra of arsenate using various Ag/GL substrates as active substratestimes: (a) 2 h, (b) 3.5 h, (c) 5 h, (d) 9 h, (e) 18 h, (f) 25 h, (g) 31 h, and (h) 40 h
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