کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1441708 | 1509414 | 2012 | 6 صفحه PDF | دانلود رایگان |
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.
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► 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.
Journal: Synthetic Metals - Volume 162, Issues 21–22, December 2012, Pages 1846–1851