The Growth And Properties Research On In₂O₃ Nanostructures

In this thesis, a variety of In2O3 nanostructures having a complex structure which can be applied to applications in field emission were synthesized by chemical vapor deposition method, their growth mechanism were discussed, and the controllable growth of In2O3 nanostructures were achieved. This thesis enriched the existing morphologies of In2O3 nanostructures and the study of crystal growth. This thesis further studied the optical, electrical properties of In2O3 nanostructures, and their applications in the field emission flat panel display devices, explored the relationship between morphology and field emission properties, and offered a new field emission cathode material and construction unit for the field emission flat panel display devices and functional nanodevices. This thesis contains the following works and innovations:1. In2O3 nanorods, nanotowers, nanowhiskers, nanoarrows etc., were synthesized successfully by chemical vapor deposition method through appropriately changing the experimental conditions, such as source materials, temperature, carrier gas flow, and the polygonal nanotower structure was obtained for the first time.2. The effect of experimental parameters during the growth process of In2O3 nanostructures on the growth and morphology was studied, and their growth mechanisms were discussed in detail. What's more, the controlled growth of In2O3 nanostructures were achieved, and the limitation that's difficult to controllable synthesize complex nanostructures was break through.3. High resolution transmission electron microscopy and scanning electron microscopy were used to characterize the structure and morphology of In2O3 nanostructures; XRD, Raman, EDS and PL spectra were used to analyze the composition, structure and optical properties of In2O3 nanostructures.4. The field emission properties of In2O3 nanostructures were measured by a field emission measuring equipment with diode model, and the relationship between the morphology of In2O3 nanostructures and their field emission properties were further studied. This thesis not only studied the field emission properties of large scale In2O3 nanostructures, but also studied the field emission properties of an individual In2O3 nanostructure for the first time. The results showed very good repeatability and stability, which indicates potential applications in field emission devices.