Green Preparation of Cu Nanoparticles with Bioreductor of Red Dragon Fruit Peel Extract: Visible Spectroscopy Properties. J. Trop. Pharm. Chem [Internet]. 2024 Jun. 15 [cited 2025 Jul. 2];8(1):93–100. Available from: http://jtpc.ff.unmul.ac.id/index.php/jtpc/article/view/174