| 초록 |
Despite the chirality problem leading to polydisperse materials of semiconducting and metallic types, single wall nanotubes (SWNTs) have attracted considerable interest because of their unique physicochemical, electronic, and mechanical properties. A covalent functionalization of the sidewall via diazonium ions is reported to manipulate SWNTs according to their electronic structure. The solubilities of functionalized SWNTs appeared to be different depending on solvents and the terminal functional groups of attached aromatic moieties. We checked the thermal stabilities of the functionalized SWNTs by means of temperature dependent Raman spectroscopy and thermal gravimetric analysis in the range of –196~600 C. While the radial ring breathing mode (~200 cm-1) and tangential mode (~1600 cm-1) characteristics are present, the disorder mode (~1300 cm-1) greatly enhanced by the chemical functionalization has been changed by temperature. We attempted to bind the aromatic thiol attached SWNTs on Au. Preliminary results will be discussed at the meeting. |
