Various physical and chemical methods for synthesis of metal nanoparticles have had some drawbacks. Therefore, green synthesis of gold nanoparticles (Au NPs) has became one of the most crucial emerging areas of nanobiotechnology. In the present study, plant-mediated synthesis of Au NPs was performed using Djulis (Chenopodium formosanum) shell extract as a reducing and stabilizing agent.[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]In this study, Au NPs were synthesized with high efficiency and stability using Djulis shell extract, and related antibacterial applications were demonstrated. © 2019 Society of Chemical Industry.