High Speed Production of Nanotube film for Cold Cathode Electron Emitter and Its Property Evaluation

碳纳米管场发射显示器（CNT-FED）被认为是下一代低能耗显示器。碳纳米管的合成方法多种多样。为了应用FED，碳纳米管必须很好地结晶。电弧放电法可以考虑提供这种碳纳米管。本研究的目的是建立基于火炬电弧法高速生产多壁碳纳米管（MWCNT）的方法，并对该多壁碳纳米管进行了fed使用评价。第一年的研究结果如下：(1)适宜的衬底为纯石墨或含Ni/Y的石墨。当石墨衬底含有Ni、Cu或Fe时，碳纳米管的数量比这些衬底要小。(2)当电弧连续工作时，MWCNT表面可能被破坏或消失。(3)衬底上圆弧点处的MWCNTs与衬底相对立。从制造FED的角度来看，丝网印刷方法是可取的。因此，在第二年，从石墨衬底上去除MWCNTs并收集它们的技术的发展得到了集中。因此，通过改变焊炬电弧法的排列方式，在电弧区获得了MWCNTs的小薄片。将纳米碳纳米管薄片粘贴并丝网印刷在导电玻璃上。在二极管系统中测试并验证了打印的MWCNT的场致发射特性。在此基础上，研究了利用电弧放电制备碳纳米角（CNH）颗粒的方法。

Field emission display with carbon nanotube (CNT-FED) is thought to be a next generation display with low energy consumption. The carbon nanotube (CNT) can be synthesized by various kinds of methods. For applying the FED, the CNT must be well-crystallized. The arc discharge method can be considered to provide such CNT. In the present research, the aim is that the method of high speed production of the multi-walled carbon nanotube (MWCNT) is established based on the torch arc method and such MWCNT is evaluated for the use of FED.The results obtained in 1st year are summarized as follows. (1) Appropriate substrate is pure graphite or Ni/Y contained graphite. When the graphite substrate containing Ni, Cu, or Fe, the amount of CNT is smaller than those substrates. (2) When the arc is continuously operated, the MWCNT surface may be destroyed or disappeared. (3) The MWCNTs at the arc spot on the substrate stand up against the substrate.From the viewpoint of manufacturing the FED, the screen-print method is desired. Thus, in the second year, development of the technique to remove the MWCNTs from the graphite substrate and collect them was concentrated. Thus the small flakes of MWCNTs were obtained from the arcing zone by modifying the arrangement of torch arc method. The MWCNT flakes were pasted and screen-printed on the conductive glass. The filed emission property of the printed MWCNT was tested and confirmed in diode system. Furthermore, the method to produce the carbon nanohorn (CNH) particle was developed based using the arc discharge.