Figure 2. (a) UV–Vis absorption spectra of AgNPs suspension with various weight fractions of POE-imide and NSP. Inset: NSP/POE-imide/AgNO3 reductions with weight ratios of (1) 1:20:20, (2) 1:10:10, (3) 1:20:10,and (4) 0:1:1. (b) TEM images of NSP/POE-imide/AgNO3 with weight ratios of (1) 1:20:20 and (2) 0:1:1.Histograms of the Ag particle sizes, determined from TEM images of NSP/POE-imide/AgNO3 with weight ratios of (3) 1:20:20 and (4) 0:1:1