Growth of Feature-Controlled ZnO Nanotube Arrays by Using Patterned Apertures with Hydrothermal Method

ZnO nanotube arrays with controlled diameter and density were synthesized on ZnO/Si substrate with thereon two-dimensional periodic polymer aperture arrays at low temperature. The growth behavior of the ZnO nanotube arrays was found to be strongly dependent on the opening of the aperture. An obvious size and density variation of ZnO nanotube arrays with the size of aperture was observed. The detailed growth behavior was characterized and analyzed in this research. This investigation offers a capability to control the formation of single/multiple ZnO nanotube(s) with both size and density onto random substrates for potential optoelectronics applications.