Euphorbia hirta L. – mediated green synthesis of Fe, Ni and Fe-Ni alloy nanoparticles: Characterization and colloidal stability - Beaula Mercy David Anthonyswamy; Anju Rani George; Sradha Sajeev; Kavimani Thangasamy; Madhu Priya Govindhan Anbazhagan; Natesan Geetha (Next Nanotechnology, 2026)