the formation of small Ag-NPs with a narrow size distribution. However, further increases in pH showed adverse effects on parti- cle size and size distribution. Curve d in Fig. 2B (pH = 12.62) is broader than curve c (pH = 11.40), indicating the increased particle size distribution at higher pH. In Fig. 2B, the inset digital images of the nanocomposite solutions display different colors in visible light. The sample that had an absorption peak with lower kmax ap- peared a bright brown color, which changed towards reddish green with the shift in the kmax of the absorption peak. This may be attributed to the SPR of Ag-NPs with different size and size distri- butions [18]. These results demonstrated good agreement with the results obtained by FESEM and TEM.