ANTIBACTERIAL ACTIVITIES OF GOLD NANOPARTICLES SYNTHESIZED BY CITRUS LIMONUM FRUIT EXTRACT

In this study gold nanoparticles were synthesized successfully in a different way by using citrus limon fruit extract and auric chloride. The phytochemistry of the citrus limon fruit extract was performed on GC-MS. The gold nanoparticles were characterized by X-ray Powder Diffraction Method (XRD), UV visible spectroscopy, Fourier Transformation Infrared Transformation (FTIR), and Scanning Electron Microscopy (SEM), coupled with EDX. The UV absorption peak at 550 nm was interpreted as that of gold nanoparticles. The XRD results indicated that gold nanoparticles were crystalline. The X-ray peak broadening showed the crystallite size of the order of ~ 32 ± 8 nm. The FT-IR, SEM, and EDX results also confirmed the formation of gold nanoparticles. The synthesized gold particles were studied with pathogens for antimicrobial activities. They showed large inhibitory zones compared to the standard antibiotic against foodborne pathogens such as Klebsiella pneumonia and Listeria monocytogenes.