Showing papers by "Hideki Shirakawa published in 1979"
TL;DR: In this article, it was deduced that the sudden occurrence of high electrical conductivity in polyacetylenes doped with electron donors or acceptors is essentially brought about by the transfer of an electron from the highest occupied band (pi ) or to the lowest unoccupied band ( pi*) of the parent polyacetylene.
Abstract: The electronic properties of pure polyacetylene have been studied on the basis of the one-dimensional tight-binding LCAO-SCF-MO calculations. It is deduced that the sudden occurrence of high electrical conductivity in polyacetylenes doped with electron donors or acceptors is essentially brought about by the transfer of an electron from the highest occupied band ( pi ) or to the lowest unoccupied band ( pi *) of the parent polyacetylene.
41 citations
TL;DR: In this article, the X-ray photoelectron spectra of iodine-doped polyacetylene (CHIx)n films were studied and it was concluded that iodine is more concentrated in the surface region than in the bulk when the amount of the doped iodine is small.
Abstract: The X-ray photoelectron spectra of iodine-doped polyacetylene (CHIx)n films are studied. By comparing with the results of Raman spectroscopy, it is concluded that iodine is more concentrated in the surface region than in the bulk when the amount of the doped iodine is small (i.e., x<0.05). It is probable that in a heavily iodine-doped film, iodine is distributed more homogeneously throughout the film, and that a considerable amount of iodine in the surface region can be easily liberated when the film is kept in vacuum. The mole ratio of I5−/I3− is higher in the surface region than in the bulk.
17 citations