Synthesis, Optical Properties and Functional Applications of ZnO Nano-materials: A Review

This review article summarizes briefly some important achievements of our recent research on the synthesis, optical properties and novel applications of nano-strucured ZnO such as nanorods and honeycomb shaped 3-D (dimension) nano random-walls. A chemical reaction/vapor transporatation deposition technique was employed to fabricate those structures on ZnO/SiO2/Si substrate without any catalyst and additive in a simple tube furnace to aim the low-cost and high qualified samples. Random laser action with strong coherent feedback at the wavelength between 375 nm- 395 nm has been firstly observed under 355 nm optical excitation with threshold pumping intensity 0.38 MW/cm(2) in ZnO 3-D random-wall nanostructure.