A simple experiment was also carried out to investigate the
probability for the formation of NiNPs from AgNPs in the
presence of NaBH4. In this direction 1/2 were added to a
solution containing AgNPs along with NaBH4 (c, 3 × 10−2 M,
100 μL). Insignificant changes were observed for the SP band
except more prominent band for dipyrrin core (Supporting
Information, Figure S12). From this result, we exclude the
possibilty of formation of NiNPs from AgNPs in the presence
of NaBH4.