Terahertz complex conductivity of nanofibrillar cellulose-PEDOT:PSS composite films

被引：16
|
作者：
Unuma, Takeya [1 ]
Kobayashi, Omou [1 ]
Hamdany, Iffah F. A. [1 ]
Kumar, Vinay [2 ]
Saarinen, Jarkko J. [3 ]
机构：
[1] Nagaoka Univ Technol, Dept Elect Elect & Informat Engn, Nagaoka, Niigata 9402188, Japan
[2] VTT Tech Res Ctr Finland Ltd, High Performance Fiber Prod, Espoo 02044, Finland
[3] Univ Eastern Finland, Dept Chem, POB 111, Joensuu 80101, Finland
来源：
CELLULOSE | 2019年 / 26卷 / 05期
关键词：
Nanofibrillar cellulose; Conducting polymers; Composite films; Terahertz spectroscopy; Charge transport; NANOCELLULOSE; TRANSPARENT; POLYPYRROLE; PAPER; REFLECTANCE; NANOFIBERS; METAL; BULK;
D O I：
10.1007/s10570-019-02276-5
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
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. [GRAPHICS] .
引用
收藏
页码：3247 / 3253
页数：7
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