title: Synthesis of polyaniline-coated carbon nanotubes and study on their pH-sensitive conductivity.
abstract: We report the synthesis of polyaniline-coated-carbon nanotubes (PANI-c-CNTs) composites by using water-soluble CNTs with phenyl sulfonate groups as templates. A series of characterizations including transmission electron microscopy (TEM), Fourier-Transform Infrared Spectroscopy (FTIR) and UV-vis spectroscopy were conducted to investigate the formation of PANI coating on the surfaces of the CNTs. The thickness of PANI coating in the PANI-c-CNTs composites was controlled by adjusting concentrations of aniline and CNTs. The conductivities of PANI-c-CNTs composites were measured by using conductive atomic force microscopy (c-AFM). It was found that the conductivities of PANI-c-CNTs composites were remarkably affected after doping and dedoping process of PANI coating by different pH solution. Therefore, our preliminary result indicates that as-prepared PANI-c-CNTs composites may be used as gas sensor such as HCl and NH3 vapor.
authors.forename: Houshen
authors.initials: H
authors.lastname: Li
authors.forename: Wenchao
authors.initials: W
authors.lastname: Ding
authors.forename: Qiurong
authors.initials: Q
authors.lastname: Shi
authors.forename: Yijing
authors.initials: Y
authors.lastname: Li
authors.forename: Peina
authors.initials: P
authors.lastname: Zhang
authors.forename: Cong
authors.initials: C
authors.lastname: Feng
authors.forename: Haibing
authors.initials: H
authors.lastname: Xia