Zn–Cu-codoped SnO2 nanoparticles: Structural, optical, and ferromagnetic behaviors
Zulfiqar Syed1, 2, Iqbal Zainab3, Lü Jianguo1, †
       

(color online) TEM images of Zn–Cu-codoped SnO2 nanoparticles calcined at (a) 400 °C and (b) 600 °C, and SAED patterns of Zn–Cu-codoped SnO2 nanoparticles calcined at (c) 400 °C and (d) 600 °C.