What is it about?
A helical polyacetylene (H-PA) film in which bundles consisting of fibrils with diameters of approximately 100 nm are twisted and concentrically curled was prepared using a liquid-crystal polymerization method. The H-PA film doped iodine was carbonized at 800℃ in Ar gas atmosphere. A carbon film having hierarchically helical graphitic structures was obtained after the carbonization without thermal decomposition (morphology-retaining carbonization) and then heat-treatment at higher temperatures.
Featured Image
Why is it important?
The PA films are well-known to be unstable under atmosphric conditions. However, the carbonized PA films are quite stable and, also, in the case of H-PA films the structural properties of the helicity mentioned above were retained after the morphology-retaining carbonization.
Perspectives
It is expected that the graphitic films will exhibit intrinsc functions and performances such as magnetic properties.
Dr Mutsumasa Kyotani
Read the Original
This page is a summary of: Hierarchically Controlled Helical Graphite Films Prepared from Iodine-Doped Helical Polyacetylene Films Using Morphology-Retaining Carbonization, Journal of the American Chemical Society, November 2011, American Chemical Society (ACS),
DOI: 10.1021/ja2082922.
You can read the full text:
Contributors
The following have contributed to this page
