1806
Chem. Mater. 1999, 11, 1806-1813
A New and Easy Method for Making Well-Organized Micrometer-Sized Carbon Tubes and Their Regularly Assembled Structures Chien-Chung Han,* Jyh-Tsung Lee, Reen-Woei Yang, Hua Chang, and Chein-Hwa Han† Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan, ROC Received January 14, 1999. Revised Manuscript Received April 14, 1999
Partially ordered micrometer-sized carbon tubes several centimeters in length have been prepared via a new chemical approach by the pyrolysis of composite fibers consisting of a thermally more stable polypyrrole (PPy) skin layer and a poly(ethylene terephthalate) core. The wall thickness of resultant hollow carbon tubes was found to be directly proportional to the thickness of the original PPy coating. Elemental analysis results indicated that these tubes essentially consisted of pure carbon, accompanied by a small amount of N (
