Figure 5From: Electronic structures and optical properties for Ag-N-codoped ZnO nanotubesDielectric function spectra of pure and Ag-N-codoped (8,0) ZnO nanotubes. (a) Configurations of Ag1, Ag1N2, Ag1N2,3,4, and Ag1N3,4. (b) Configurations of Ag1N2, Ag1N5, and Ag1N6.Back to article page