The Field Emission Properties Of Carbon Nanotubes And Diamond Ultrafine Synthetic Materials

The cathode materials have attracted many researchers eyes. Now the mere CNT thin film and the diamond thin film are the mainly cathode materials which are reported. It has been proved that the CNT has good characteristic on the field emission. At the same time, people have noticed that the Nanosized diamond has a low NEA. Considering that, the research on the field emission of the CNT and Nanosized diamond particles composed materials is meaningful. Having noticed that in some organic solution, the surface of the Nanosized diamond particles can get some negative voltage for they can absorb some ions, we can make the Nanosized diamond particles calculated on the cathode by the cathodic electrophoretic method, which is important to make the CNT and the Nanosized diamond particles composed materials.We successfully make the Nanosized diamond particles calculated on the cathode and get the composed materials by electrophoretic method. Comparing to the PECVD method by which people make the CNT and Nanocrystal diamond grow currently on the same substrate, It's more simple, economic and easy to control.The main jobs are followed:1. We make the Nanosized diamond particles calculated on the cathode by electrophoretic method, and test the samples (5min and 15 min) field emission properties separately.2. We make the diamond thin film by MPCVD on the Mo substrate. Considering the experiment conditions we do the same work on the samples, which are get by the step 1, then we test the thin film field emission properties3. We make out the CNT thin film by the coating method, and then we test the thin film field emission properties4. We make the sample that is get by the step 3 as the cathode. Then we get the composed materials by electrophoretic method. Then test and analysis on the samples field properties. We find it has lower emmision electic field...