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Table 1 The mean sizes of the AgNPs in the double-layer Ag films prepared in 5/2.5 mM AgNO3/BuNH2 solution at different reaction times of 1.5-40 h

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

Reaction time (h)

Size of AgNPs (nm)

 

1st-layer

2nd-layer

1.5

20 ± 5

/

2

35 ± 10

/

5

40 ± 8

60 ± 15

18

35 ± 12

80 ± 20

25

45 ± 10

150 ± 30

40

50 ± 10

180 ± 30

  1. The mean sizes were obtained by averaging the diameters of 15-50 particles in each layer

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