TY - JOUR
T1 - Terahertz complex conductivity of nanofibrillar cellulose-PEDOT:PSS composite films
AU - Unuma, Takeya
AU - Kobayashi, Omou
AU - A. Hamdany, Iffah F.
AU - Kumar, Vinay
AU - Saarinen, Jarkko
N1 - According to the publication, Kumar & Saarinen were not affiliated with ÅAU. They were, however, employed by Åbo Akademi University when the experimental work was done. The publication should, therefore, be included among our publications. [Checked with Martti Toivakka 8.3.2019 LN]
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Post-print, 12 mån embargo.
First Online 25 January 2019
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PY - 2019
Y1 - 2019
N2 - We investigate the terahertz transmission through flexible composite films that contain nanofibrillar cellulose (NFC) and different blending percentages of the conductive polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS). The real part of terahertz complex conductivity is found to decrease with decreasing frequency for each NFC composite film and to approach a finite positive value dependent on the PEDOT:PSS blending percentage in the limit of zero frequency. Both the real and imaginary parts of complex conductivity spectra can be fitted simultaneously with an extended Drude model that describes a partially localized nature of carriers. Our spectral analysis indicates that carriers in the NFC composite become denser and also less localized as the PEDOT:PSS blending percentage is increased.
AB - We investigate the terahertz transmission through flexible composite films that contain nanofibrillar cellulose (NFC) and different blending percentages of the conductive polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS). The real part of terahertz complex conductivity is found to decrease with decreasing frequency for each NFC composite film and to approach a finite positive value dependent on the PEDOT:PSS blending percentage in the limit of zero frequency. Both the real and imaginary parts of complex conductivity spectra can be fitted simultaneously with an extended Drude model that describes a partially localized nature of carriers. Our spectral analysis indicates that carriers in the NFC composite become denser and also less localized as the PEDOT:PSS blending percentage is increased.
U2 - 10.1007/s10570-019-02276-5
DO - 10.1007/s10570-019-02276-5
M3 - Artikel
SN - 0969-0239
VL - 26
SP - 3247
EP - 3253
JO - Cellulose
JF - Cellulose
IS - 5
ER -