Analysis of Field Emission Properties of Carbon Nanocoils for Imaging Materials

作     者：Yasumoto Konishi,Hiroyoshi Tanaka,Yoshikazu Nakayama,Osamu Suekane,Toshikazu Nosaka 

作者机构：Department of Physics and Electronics Osaka Prefecture University Sakai Osaka 599-8531 Japan Department of Physics and Electronics Osaka Prefecture University Sakai Osaka 599-8531 Japan Department of Physics and Electronics Osaka Prefecture University Sakai Osaka 599-8531 Japan Innovation Plaza Osaka Japan Science and Technology Agency Izumi Osaka 594-1144 Japan Handai Frontier Research Center Graduate School of Engineering Osaka University Osaka 565-0871 Japan Handai Frontier Research Center Graduate School of Engineering Osaka University Osaka 565-0871 Japan Innovation Plaza Osaka Japan Science and Technology Agency Izumi Osaka 594-1144 Japan Technology Research Institute of Osaka Prefecture Izumi Osaka 594-1157 Japan 

出 版 物：《仪器仪表学报》 (Chinese Journal of Scientific Instrument)

年 卷 期：2004年第S3期

页      面：72-75+115页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：This work was supported in part by Grant in Aid from Japan Society for the Promotion of Science 

主　　题：Carbon nanocoil Field emission Carbon nanotube Finite element method 

摘      要：Carbon nanotubes and nanocoils are expected as the charging materials and electron gun for the imaging devices. It is synthesized for carbon nanocoils with different diameters by the catalytic thermal decomposition of acetylene using iron-indium-tin-oxide catalysts. It is found that the turn-on voltage is decreased by decreasing the average diameter of the grown carbon nanocoils. The turn on voltage of as low as 30 V at the electrodes gap of 130 μm has been achieved when the coil diameter is decreased to 60 nm. The calculation for the concentration of the electric field on the coil surface has been performed using a finite element method. It is obtained that the strength of electric field around the top ring of a coil is increased with the decrease of the tubular diameter of the coil and has a similar value for that at the tip of a carbon nanotube, suggesting that the efficiency of the field emission from nanocoils would be higher than that from nanotubes. These results can explain the good stability of field emission from carbon nanocoils.