| 초록 |
Carbon nanotubes are widely investigated as composite materials due to their novel structural, electronic, and mechanical properties. Especially well-arrayed CNTs are highly desirable to enhance the physical properties in nanodevices. In this research, lyotropic liquid crystal/CNT composites were prepared, where CNTs were aligned in a LC matrix. Surfactants such as SDS and DTAB were used as host materials. CNTs were functionalized to have charged surfaces to improve dispersibility in water and compatibility with a host. CNTs were first oxidized to produce reaction sites and grafted with 11-bromoundecanol. Then, cationic or anionic moieties were introduced to the ends of the alkyl chains by the reaction with triethylamine or sodium sulfite. The changes in the surface charge of the functionalized CNTs were confirmed by zeta-potential measurement. Liquid crystalline phases of the composites were investigated. |
