Study On The Growth And Property Of Tetrapod-like ZnO Nanostructure

The tetrapod-like ZnO is a kind of semiconductor multi-function inorganic crystals materials with neat three dimensional space structure.It is considered to be one of the most promising field emission cathode materials because of its high mechanical strength,relatively stable chemical properties and prominent band bending characteristic in the high electric field.The broad application prospect of ZnO makes its study got the high attention.The tetrapod-like ZnO nanostructure are prepared with chemical vapor deposition and observed its microscopic structure through the scanning electron microscope to research the influence of reaction temperature(600 ?-950 ?)and reaction time(30 s-120 s)to its microstructure in this experiment.The results show that when the reaction temperature is about 900?.The tetrapod-like ZnO will be formed.If the reaction time was too long,crystal tip will be too long.If the reaction time was too short,crystal growth will be still not finished.The tetrapod-like ZnO is diverted to cathode by electrophoresis method to manufacture dipole field emission device.Detailed study the field emission performance of tetrapod-like ZnO prepared when the reaction temperature and time are 900 ? 60 s,950 ? 60 s and 950? 90 s.The results show that when the reaction temperature and time is 950 ? and 60 s,the sample's turn-on field is lowest(3.2V/?m)and enhancement factor is highest(2275),so its field emission performance is best.In a word,the experiment obtains the fabrication parameters of tetrapod-like ZnO field emission cathode materials through comparative study.It has a certain theoretical research and practical application value for the development of a new field emission display device and the development of its industrialization direction.