Tubular-shaped nanocarbons prepared from polyaniline synthesized by a self-assembly process and their electrical conductivity.
A tubular-shaped polyaniline less than 5 microm in length and 170 nm in outer diameter was synthesized by a self-assembly process using D-camphorsulfonic acid as a dopant. A tubular-shaped nanocarbon was prepared from the tubular-shaped polyaniline by means of pyrolysis at 1000 degrees C in argon gas. The structural and electrical properties of the resultant tubular-shaped nanocarbons were investigated using Raman scattering spectrum, X-ray diffraction measurements, scanning and transmission electron microscopes, and a low resistivity meter. The tubular-shaped nanocarbons are very short in length and are an amorphous state. The short length and amorphous tubular-shaped nanocarbon were crystallized to some extent by heat-treatment at 2600 degrees C. The tubular-shaped nanocarbons mentioned in this work are appropriate for mass production, compared to the well-known multi-walled carbon nanotubes. The electrical conductively of the tubular-shaped polyaniline was remarkably improved by the carbonization and was enhanced by the heat-treatment.
Tsukuba Research Center for Interdisciplinary Materials Science, University of Tsukuba, Ibaraki 305-8571, Japan.
Mutsumasa
M
Kyotani
Hiromasa
H
Goto
Kiyoshi
K
Suda
Takuro
T
Nagai
Yoshio
Y
Matsui
Kazuo
K
Akagi
D000814:Aniline Compounds / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D004553:Electric Conductivity; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D013499:Surface Properties
D000814:Aniline Compounds; D046911:Macromolecular Substances; D037742:Nanotubes, Carbon; C416807:polyaniline