Green Synthesis of Gold Nanoparticles using Aqueous Garlic (Allium sativum L.) Extract, and Its Interaction Study with Melamine

Abstract

Gold nanoparticles (AuNPs) have been successfully prepared by green synthesis method using aqueous extract of garlic with the Latin name of Allium sativum L. (ASL) as a reducing and stabilizing agents. Identification of active compounds in aqueous ASL extract was conducted by phytochemical analysis and Fourier transform infrared (FTIR) spectroscopy, while the synthesized AuNPs were characterized using UV-Vis spectrophotometer and transmission electron microscopy-selected area electron diffraction (TEM-SAED). The AuNPs formation was optimized at aqueous ASL extract concentration of 0.05%, HAuCl4 concentration of 2.0×10 -4 M, and pH of 3.6. The optimized AuNPs was characterized using TEM, and has a spherical shape with particle size of 15±3 nm. The particles were also stable up until one month. The synthesized AuNPs has been studied its interaction with melamine, and showed the optimum pH of interaction at 3.6.

Biogenic synthesis of silver, gold, and palladium nanoparticles using moringa oleifera seeds: exploring photocatalytic, catalytic, and antimicrobial activities

“…The presence of surface plasmon band absorption at 449 and 445 nm in the spectra of Ag10 and Ag20, respectively, is attributed to the existence of Ag NPs [23]. The optical spectrum of gold colloids Au10 and Au20 has strong surface plasmon bands at 538 and 536 nm, which confirms the reduction of gold ions in the reaction surface [24].…”

Evaluation of bioactivity and antibacterial properties of Ti6Al4V-based green biocomposite implant encompassing TiO2 nanotube arrays and garlic extract

“…The presence of C–N stretching vibrations in primary amines was detected at 1015.3 cm −1 , and at 929.7 cm −1 , the presence of γ-C-H deformation in = CH2 was noted. Furthermore, the presence of an S–C bond at 818.68 cm −1 suggests the absorption of allicin, an organosulfur compound found in garlic extract [ [59] , [60] , [61] , [62] , [63] , [64] , [65] ].…”

Localized surface plasmon resonance shift of biosynthesized and functionalized quasi-spherical gold nanoparticle systems

“…Organosulfur compounds from AS extract can provide stabilization to Au nanoparticles. 40 Specifically, the observed stability could be imparted by the organosulfur compounds that substituted or displaced the previous capping compounds ( i.e. oxidized polyphenols and organic acids).…”