| Summary: | 碩士 === 國立清華大學 === 材料科學工程學系 === 95 === Carbon nanotubes (CNTs) were synthesized on glass substrates at low temperature (550℃) using binary catalyst, Co/Ti, which is applicable to the preparation of large area field emission devices. It has been found that the catalyst activity is affected not only by the thickness of the catalysts, but also by their thickness ratio. In order to let the glass can conduct electricity, we try to find a lot of different materials as an electrode.
The results were different when the samples were subjected to different flow field of carbon source. We have used the different height of the quartz boats to change the flow field during CNTs growth. The field emission current density increased with the stream velocity in the flow field. Screen effect due to high dense CNTs reduces the emission properties, and it can be alleviated by thermal oxidation or oxygen plasma. Additionally, we hope increase more emission site to shoot more electron.
|
|---|
