Fig. 2.

(a) Ultraviolet–visible spectroscopy analysis of synthesized gold nanoparticles taken at two different time (75 min and at 60 day). The maximum peak was noted at 540 nm. (b) Transmission electron microscope image of AuNPs synthesised by Anacardium occidentale leaves extract. (c) X-ray diffraction patterns of green synthesised AuNPs. (d) EDX Spectrum of AuNPs synthesized from Anacardium occidentale. (e) Particle diameter distribution measured through a particle size analyser. The average size of nanoparticles was found to be 40 nm (n = 3).