Fabrication and characterization of hexagonally patterned quasi-1D ZnO nanowire arrays
1 Department of Electronic Engineering, Chang Gung University, Kweishan, Taoyuan 333, Taiwan
2 Advanced Optoelectronic Technology Center, National Cheng-Kung University, Tainan 701, Taiwan
Nanoscale Research Letters 2014, 9:75 doi:10.1186/1556-276X-9-75Published: 12 February 2014
Quasi-one-dimensional (quasi-1D) ZnO nanowire arrays with hexagonal pattern have been successfully synthesized via the vapor transport process without any metal catalyst. By utilizing polystyrene microsphere self-assembled monolayer, sol–gel-derived ZnO thin films were used as the periodic nucleation sites for the growth of ZnO nanowires. High-quality quasi-1D ZnO nanowires were grown from nucleation sites, and the original hexagonal periodicity is well-preserved. According to the experimental results, the vapor transport solid condensation mechanism was proposed, in which the sol–gel-derived ZnO film acting as a seed layer for nucleation. This simple method provides a favorable way to form quasi-1D ZnO nanostructures applicable to diverse fields such as two-dimensional photonic crystal, nanolaser, sensor arrays, and other optoelectronic devices.