Table 3: Energy gaps, calculated refractive indices of nanostructure ZnO using Ravindra et al. [46], Hervé and Vandamme [47], and Ghosh et al. [48] models corresponding to optical dielectric constant.

Energy (eV)

3.2459, 3.44 [49], 
1.57 [50], 0.73 [51], 
0.88 [52], 2.26 [53]
2.0355 [46], 2.27764 [47], 
2.32 [48], 2.10 [54]
4.143 [46], 5.187 [47], 
5.38 [48]