H
Hideki Shirakawa
Researcher at University of Tsukuba
Publications - 235
Citations - 7512
Hideki Shirakawa is an academic researcher from University of Tsukuba. The author has contributed to research in topics: Polyacetylene & Liquid crystal. The author has an hindex of 39, co-authored 235 publications receiving 7355 citations. Previous affiliations of Hideki Shirakawa include Ritsumeikan University.
Papers
More filters
Journal ArticleDOI
Metallic nature of heavily doped polyacetylene derivatives: Thermopower
TL;DR: In this article, the effect of the dopant ion on the charge-transport mechanism of polyacetylene was investigated and it was shown that the disorder induced by the dopants ion is more important than the three-dimensional interchain coupling.
Journal ArticleDOI
Helical polyacetylene synthesized under chiral nematic liquid crystals
TL;DR: In this article, the authors synthesized helical polyacetylene films under asymmetric and anisotropic reaction field consisting of chiral nematic (N * ) liquid crystals.
Journal ArticleDOI
Vibrational analysis of polyacetylene and copoly(acetylene+acetylene‐d2): In‐plane vibrations of trans‐polyene chains
TL;DR: In this article, normal coordinate calculations have been performed for the inplane vibrations of several trans-polyene chains from butadiene to polyacetylene in order to obtain a set of force constants commonly applicable to short and long polyenes.
Journal ArticleDOI
Density of vibrational states in trans-polyene: comparison with the infrared, Raman and neutron spectra of trans-polyacetylene
TL;DR: In this article, the density of states has been calculated for the in-plane and out-of-plane vibrations in the infinite trans polyene chains, and the IR bands newly assigned to the trans segments include the 740 cm −1 band, which was previously assigned to remnant cis CC bonds.
Journal ArticleDOI
Frequency dependence of electron spin-lattice relaxation rate at 5–450 MHz in pristine trans-polyacetylene --- new evidence of one dimensional diffusive motion of electron spin (neutral soliton) ---
TL;DR: In this paper, electron spin-lattice relaxation rate T l −1 has been measured at low frequencies 5 −450 MHz in pristine trans-polyacetylene and the relaxation mechanism was identified as dipolar and hyperfine origin based on an electron spin concentration dependence.