Preparation Conditions Effect On The Morphology And Structure Of SnO₂Nanometer Structure

Nowadays，the research of Nanometer materials is a hot spot in the material science,whichradically changed the structure of the material and developed new ways for the question whichfailed to work out in the long-term that material science research in past years. SnO₂is animportant function materials that is widely used in optical electronic and microelectronics,moreover,it can be used in solar cells, transparent conducting electrode, gas sensors, thetransistors, and other devices. In recent years, with the development of the SnO₂nanometerstructures such as zero dimensional nanometer particles, one-dimensional nanometer wires,nanotubes, nanometer, nanorods and two-dimensional nanometer membrane structure appearedone after another. Scientists from all over the world have launched a series of research work forits structure and application, and they have achieved fruitful research results in a shorttime.However, we still face lots of challenges on the research of the synthesis, structure andapplication about the one-dimensional SnO₂nanometer materials.The auther obtain the differentshape of SnO₂Nanometer materials by thermal evaporation method under differentconditions,such as by changing the raw materials, annealing time and annealing temperature.then the auther using SEM, XRD, EDS, infrared absorption and Raman spectrum to identify themorphology and structure of product， and the results show that the synthetic product with foursides rutile structure of SnO₂. Finally discussed the growth mechanism of SnO₂nanometermaterials. The paper mainly includes the following aspects:1)with SnO powder as raw material, changing the annealing time and annealingtemperature, we obtain the SnO₂nanometer materials by the method of thermal evaporationfrom the silicon substrate which coated with gold, and explore the growth process of SnO₂nanometer materials.Finally we get out that the growth of SnO₂nanometer materials overdependent on temperature and time.（2） With the SnO powder as raw material,we obtain the SnO₂nanometer particles by themethod of thermal evaporation on the silicon substrate which coated with gold when annealingtemperature is1000degrees.besides,we obtain different nanometer particles by changingdifferent annealing time.At last,we come to a conclusion that the nanometer materials is not better when the annealing temperature and the annealing time is much higher, but there anappropriate annealing time at any temperature。SnO₂nanometer particles conform to the VLSgrowth mechanism.（3） with the mixture of SnO and Sn as raw material, we obtain nanometer nail by themethod of thermal evaporation on the silicon substrate which coated with gold when annealingtemperature is900degrees.After testing, the sample is pure SnO₂. And SnO₂nanometer nailconforms to the VLS growth mechanism.（4） with the mixture of SnO and Sn as raw material, we obtain nanometer nail by themethod of thermal evaporation on the silicon substrate which coated with gold when annealingtemperature is1000degrees.By changing the annealing time, there are different degree ofclusters.（5）Summarizing all the experiments,the auther try to answer the reason for obtainingdifferent nanometer materials.