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

Takeya Unuma; Omou Kobayashi; Iffah F.A. Hamdany; Vinay Kumar; Jarkko J. Saarinen

doi:10.1007/s10570-019-02276-5

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

Takeya Unuma^*
, Omou Kobayashi
, Iffah F.A. Hamdany
, Vinay Kumar
, Jarkko J. Saarinen

^*Corresponding author for this work

Nagaoka University of Technology
University of Eastern Finland

Research output: Contribution to journal › Article › Scientific › peer-review

19 Citations (Scopus)

Abstract

Abstract: 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. Graphical abstract: [Figure not available: see fulltext.].

Original language	English
Pages (from-to)	3247-3253
Number of pages	7
Journal	Cellulose
Volume	26
Issue number	5
DOIs	https://doi.org/10.1007/s10570-019-02276-5
Publication status	Published - 30 Mar 2019
MoE publication type	A1 Journal article-refereed

Keywords

Charge transport
Composite films
Conducting polymers
Nanofibrillar cellulose
Terahertz spectroscopy

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10.1007/s10570-019-02276-5

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title = "Terahertz complex conductivity of nanofibrillar cellulose-PEDOT:PSS composite films",

abstract = "Abstract: 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. Graphical abstract: [Figure not available: see fulltext.].",

keywords = "Charge transport, Composite films, Conducting polymers, Nanofibrillar cellulose, Terahertz spectroscopy",

author = "Takeya Unuma and Omou Kobayashi and Hamdany, \{Iffah F.A.\} and Vinay Kumar and Saarinen, \{Jarkko J.\}",

note = "Funding Information: Acknowledgments This work was partly supported by a Nagaoka University of Technology Presidential Research Grant. J. J. S. wishes to thank the UEF Faculty of Science and Forestry (Grant No. 579/2017) for the financial support. {\AA}bo Akademi University (Laboratory of Paper Coating and Converting) and South China University of Technology (State Key Laboratory of Pulp and Paper Engineering) are acknowledged for laboratory access during the sample preparation and for producing NFC suspensions, respectively. Funding Information: This work was partly supported by a Nagaoka University of Technology Presidential Research Grant. J. J. S. wishes to thank the UEF Faculty of Science and Forestry (Grant No. 579/2017) for the financial support. ?bo Akademi University (Laboratory of Paper Coating and Converting) and South China University of Technology (State Key Laboratory of Pulp and Paper Engineering) are acknowledged for laboratory access during the sample preparation and for producing NFC suspensions, respectively. Publisher Copyright: {\textcopyright} 2019, Springer Nature B.V. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.",

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doi = "10.1007/s10570-019-02276-5",

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T1 - Terahertz complex conductivity of nanofibrillar cellulose-PEDOT:PSS composite films

AU - Unuma, Takeya

AU - Kobayashi, Omou

AU - Hamdany, Iffah F.A.

AU - Kumar, Vinay

AU - Saarinen, Jarkko J.

N1 - Funding Information: Acknowledgments This work was partly supported by a Nagaoka University of Technology Presidential Research Grant. J. J. S. wishes to thank the UEF Faculty of Science and Forestry (Grant No. 579/2017) for the financial support. Åbo Akademi University (Laboratory of Paper Coating and Converting) and South China University of Technology (State Key Laboratory of Pulp and Paper Engineering) are acknowledged for laboratory access during the sample preparation and for producing NFC suspensions, respectively. Funding Information: This work was partly supported by a Nagaoka University of Technology Presidential Research Grant. J. J. S. wishes to thank the UEF Faculty of Science and Forestry (Grant No. 579/2017) for the financial support. ?bo Akademi University (Laboratory of Paper Coating and Converting) and South China University of Technology (State Key Laboratory of Pulp and Paper Engineering) are acknowledged for laboratory access during the sample preparation and for producing NFC suspensions, respectively. Publisher Copyright: © 2019, Springer Nature B.V. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.

PY - 2019/3/30

Y1 - 2019/3/30

N2 - Abstract: 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. Graphical abstract: [Figure not available: see fulltext.].

AB - Abstract: 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. Graphical abstract: [Figure not available: see fulltext.].

KW - Charge transport

KW - Composite films

KW - Conducting polymers

KW - Nanofibrillar cellulose

KW - Terahertz spectroscopy

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DO - 10.1007/s10570-019-02276-5

M3 - Article

AN - SCOPUS:85060624902

SN - 0969-0239

VL - 26

SP - 3247

EP - 3253

JO - Cellulose

JF - Cellulose

IS - 5

ER -

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

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Keywords

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