Self-assembly of single-walled carbon nanotube based on diazoresin

The self-assembly film of single-walled carbon nanotube (SWCNT) based on diazoresin (DR) were prepared on CaF2, mica substrates and Pt tip. After oxidation, the ends of SWCNT were opened and turned into carboxylic group, which can react with diazonium group via Coulombic attraction. The film formed was photosensitive. After UV irradiation, the ionic bond between carboxylic group and diazonium group would turn into covalent bond following the decomposition of the diazonium group. The self-assembly layer and the bond conversion between the layers of the film have been verified with infrared (IR) spectroscopy, UV-Vis spectroscopy and transmission electron microscope (TEM).