Affiliation: | 1.Solid State Physics Department, Physics Research Division, National Research Centre, 33 El Bohouth St., Dokki, Giza, 12622, Egypt ;2.Microbial Chemistry Department, National Research Centre, 33 El Bohouth St., Dokki, Giza, 12622, Egypt ;3.Thin Film and Electron Microscope Department, Physics Division, National Research Center, 33 ElBehouth St., Dokki, 12622, Giza, Egypt ; |