Green Synthesis of Gold Nanoparticles using Aloe Vera Leaf Extracts and its Antibacterial Activity

Gold nanoparticles (AuNPs) have wide-ranging applications across scientific disciplines and industries. However, its conventional synthesis methods pose environmental and health risks, prompting the rise of green chemistry for sustainable and eco-friendly nanoparticle production. Plant extracts rich in bioactive compounds capable of reducing and capping nanoparticles have emerged as promising alternatives. Among these sources, Aloe vera, renowned for its diverse phytochemicals, presents an attractive avenue for nanoparticle synthesis devoid of hazardous reagents. This study delves into the one-step green synthesis of AuNPs employing aloe vera extract and examines their antibacterial efficacy against Gram-positive and Gram-negative bacteria. The synthesized AuNPs exhibited a reddish-purple color with localized surface plasmon resonance peaks at 529 nm, 535 nm, and 541 nm, corresponding to varying gold precursor concentrations (0.1 mM, 0.3 mM, and 0.5 mM). FTIR analysis confirmed the pre