Controllable density of aligned zinc oxide nanorod arrays by molarities variation

In this paper, we have demonstrated a controllable growth of densely-packed aligned zinc oxide (ZnO) nanorod arrays by molarities variation using chemical bath depositon (CBD) method at low temperature. By increasing the solution´s molarities, the grown nanorods become denser, eliminating the empty space that leads to an electron trapping phenomenon. This must be due to the extra supplement of Zn ion in the solution at higher molarities. This will then lead to a better conductivity that might be useful for other electronic devices applications.