Figure 2.

FTIR spectrum of biosynthesized Bauhinia tomentosa Linn flower-powder extract-derived AgNPs. Characterisitc peaks indicated the presence of aliphatic primary amine (N-H bonds, peak at 3227.92 cm⁻¹), terminal alkyne (C=C bonds, peak at 2099.24 cm⁻¹), imine/oxime (C=N bonds, peak at 1263.68 cm⁻¹), ether (C-O bond, peak at 1187.09 cm⁻¹) and aliphatic bromo components (C-Br bond, peak at 1081.58 cm⁻¹) and also indicate the formation of reduced silver atoms (Ag⁰, peaks at 706.63 cm⁻¹ to 408.76 cm⁻¹).