Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1441708 | Synthetic Metals | 2012 | 6 Pages |
We report on electrical and optical characteristics such as power absorption, index of refraction, and conductivity of new form of the model conjugated polymer–polyacetylene (PA)–helical PA graphite films (h-PA) in the 0.1–2.5 THz spectral range. The results were obtained using the transmission THz time-domain spectroscopy. The frequency dependencies of the electrical and optical characteristics can be reasonably well fitted by the Drude model, which gives a plasma frequency of about ∼124 THz and a charge carrier scattering time ∼30 fs, which is less by an order of magnitude than that of crystalline materials. The obtained results demonstrate that doped h-PA graphite films retain metallic behavior in the THz spectral range even at ambient conditions contrary to conventional doped PA films.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Helical polyacetylene (h-PA) graphite films studied by THz time-domain spectroscopy. ► Absorption, refraction, conductivity of h-PA graphite films studied at 0.1–2.5 THz. ► THz dependencies of h-PA graphite films can be well fitted by the Drude model. ► Doped h-PA graphite films retain metallic behavior in the THz spectral range.