ZnO nanostructures are very promising for applications in field emission displays and photonic devices operating in blue and UV spectral ranges due to its wide band gap(3.37 eV) and large exciton binding energy(60 meV).Therefore

fabrication and properties of ZnO nanostructures have attracted considerable attention recently.Various ZnO nanowires have been synthesized by thermal vapor transport and condensation method from the pure Zn powder or a mixture of ZnO In

2

O

3

and graphite powder with a air pressure or a N

2

/O

2

pressure.By varying the experimental conditions

we found more ZnO nanostructures such as tetrapods

combs

nanorods and nanobelts.These nanowires have diameters of about 50~1 000 nm

and the length range is about 1~20 μm.The structure of deposited materials was investigated by X-ray diffraction

scanning electron microscopy

transmission electron microscopy and selected area electron diffraction

which reveals the shape of all the ZnO nanowires are hexagonal structure.The luminescent properties of ZnO tetrapods was investigated by excitation spectrum and PLspectrum.The PLspectrum excited with the 210 nm of a Xe lamp at room temperature revealed a strong green emission band centered at about 500 nm with FWHM about 90 nm and a weaker near UVemission band centered at about 380 nm with FWHM about 15 nm.The PLspectrum excited with 325 nm of He-Cd laser at room temperature revealed a strong and narrow near UV emission band centered at about 383 nm with FWHM about 16 nm and a weaker broad emission band centered at about 515 nm with FWHM about 76 nm.