Effect of Hydrazine Treatment on Physicochemical Characteristics of Single-Walled Carbon Nanotube Networks

• Main Authors: Liao, Yu-Chun, 廖昱淳
• Other Authors: Wang, Pen-Cheng
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/06029291494578822763

碩士 === 國立清華大學 === 先進光源科技學位學程 === 98 === In this study, a simple thermal pyrolysis chemical vapor deposition technique which was used alcohol vapor as the carbon source was synthesized high purity single-walled carbon nanotube on silicon substrate by double-layered catalytic system, and this sample was used a lift-off technique with BOE solution subsequently. After those processes, the SWCNT-networks successfully were separated from the silicon substrate. The lifted-off SWCNT-networks which has excellent optical and electrical properties was transferred the suspended SWCNT-networks to various substrates, and proceeded with chemical modification of reduction and oxidation treatment. Chemical modification focused primarily on the reducing agent (hydrazine) treatment in SWCNT-networks. As the results of this experiment showed, the surface of SWCNT-networks which were treated by hydrazine has bonded to their sidewalls using amino groups. This situation was induced a spontaneous charge transfer that was led to the doping effect, and the change of SWCNT-networks’ conductivity. The phenomenon of charge transfer was analyzed by the four-point probe systems, field emission scanning electron microscope, Raman spectroscopy, X-ray Photoemission spectroscopy, and Ultra-violet Photoelectron spectroscopy. Though those analyses was investigated the pristine and reacted SWCNT-networks properties of conductive characteristics, the sidewall structure, chemical bonding species and valence bond electronic structure. Those overall results provide a comprehensive exploration. This paper was also compared the characteristics of hydrazine treatment with acid treatment. We have proposed the reduction effect by hydrazine treated pre-oxidized SWCNT-networks.