A method to prepare field emission cathode plates with CNTs using chemical-displacement plating

• Main Authors: Jun Yu Yeh, 葉潤宇
• Other Authors: Yann Cheng Chen
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/60922292665927991874

碩士 === 國防大學中正理工學院 === 應用化學研究所 === 96 === This research develops a carbon nanotubes field emission cathode plate which is prepared by chemical-displacement plating method. This technique has potential to replace commonly used processes, such as screen printing paste and directly grows carbon nanotubes by CVD process and so forth. Chemical-displacement plating method process has numerous advantages, for example: This law plates the fluid to be allowed to repeat to use many times, also after long time laying aside, also may use many times, therefore plates the fluid stability to be extremely good, In addition The cost of material consumed by it is relatively low, the instrument and equipment are cheap, can carry on the large area and mass-produce, and it’s uniform property is exactly great. Besides the composite coating made by electroless plating method have strong adhesion between the glass matrix without using other additional way. In this study, the CNTs and nickel phosphorus alloy were co-deposited to form displacement composite on the sodium glass surface of Zinc. First sand blasting glass in 3×3cm2, thickness approximately 2.7mm previews plates one is thin Nickel thin, the affiliation from this Nickel thin for Electric conduction thin, carries on the electricity to galvanize again the level, uses this zinc level to carry on chemistry permutation. The affiliation by between the zinc and the nickel the oxidation reduction potential difference relations, has the permutation reaction. Therefore has CNTs and nickel replacement to plate the fluid can way which altogether deposits CNTs and the nickel in glass base material surface, but the zinc level can separate out in by the ion condition. Moreover, we also CNTs to carry on the disperser test, With different chemistry replacement condition discussion, in observation replacement level CNTs content difference,field of emission characteristic with coating. In the instrumentation aspect, the favorable use launch scanning type electron microscope (FE-SEM) examines the coating surface appearance, as well as how much observation coating surface CNTs does distribute and the exposed situation; Next, the use surface electric charge and the particle size reflectoscope reflector (Zeta Plus), after the examination disperses CNTs charged and the dispersivity; Finally, the coating operation field launch which arranges the system shines with the IV-curve test. The result showed that, after the process decentralized processing carbon tube, the condition choice in carbon tube content 1.0g/L, pH=7.0, 50±3 ℃ executes plates, may obtain CNTs the even distribution to plate in the level surface, can cause the fluorescence positive plate to send out the even fluorescence.