Figure 5
From: NH4 + directed assembly of zinc oxide micro-tubes from nanoflakes
The FESEM images of ZnO nanostructures obtained at the
ratio of 3.2:1.0. (A) Zn(CH3COO)2·2H2O solution was added into (NH4)2CO3 solution, and (B) (NH4)2CO3 solution was added into the Zn(CH3COO)2·2H2O solution. (C) ZnSO4·7H2O solution was added into (NH4)2CO3 solution, and (D) (NH4)2CO3 solution was added into ZnSO4·7H2O solution.