Fig. 3From: Physicochemical and nanomedicine applications of phyto-reduced erbium oxide (Er2O3) nanoparticlesBandgap calculation and Raman Spectra (A) Plots of (F(R)hν)2 versus the photon energy (hν) after applying K–M function for calculated the optical bandgap; (B) Raman spectra of HT-Er2O3 NPsBack to article page