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
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 |