Abstract-Spectroscopy of Nafion in terahertz frequency range

Stanislav O. Yurchenko^1,a) and Kirill I. Zaytsev^1,b)
http://scitation.aip.org/content/aip/journal/jap/116/11/10.1063/1.4896194
1 Bauman Moscow State Technical University, 105005, 2nd Baumanskaya str. 5, Moscow, Russia
a) Electronic mail: st.yurchenko@mail.ru
b) Electronic mail: kirzay@gmail.com
J. Appl. Ph

We report results on the terahertz (THz) spectroscopy of polymer Nafion. Using THz pulsespectroscopy and refined post-processing algorithms based on the ill-posed spectroscopicinverse problem analysis, we find the complex dielectric permittivity of Nafion to be in the range 0.15–1.5 THz. The results in the low-frequency (gigahertz) range agree well with known measurements. We find that the complex dielectric permittivity can be described well using the double-Debye model with relaxation times of 7.20 ± 0.05 ps and 0.12 ± 0.05 ps. This result is discussed briefly from the viewpoint of the appearance of a segregated structure in the “Nafion–water” system.