 This study aimed to develop a simple procedure for the synthesis of gold nanoparticles using crescent critical leaf extract as a reducing and capping agent. The resulting gold nanoparticles were found to have antibacterial activity against human pathogens and catalytic activity in the reduction of 4-nitrophenol. This green bio-fabric approach is a fast, easy and eco-friendly alternative to chemical synthesis. This article was authored by Subramanian Balasubramanian, Sosemical Mary Jolastin Kala, Thomas Lerth of Pushparaj and others.