It is well known that ZnO is intrinsically and readily inclined to grow into 1D morphology in a liquid medium with its unique hexagonal crystal structure. For elongated ZnO material has both polar and nonpolar faces if it is grown from solution based methods [20], and the ZnO nuclei normally tend to aggregate along the polar face direction leading to form a 1D nanostructure (axial growth) [21]. However, the axial growth could be suppressed and then tabular nanostructures such as the plateor sheet-shape ZnO could be obtained (equatorial growth), if the polar faces are passivated by some growth modifiers [21]. Therefore, researchers can selectively prepare ZnO crystals with different orientations or morphologies for exploring novel properties through choosing a proper growth modifier.