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

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

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (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 languageEnglish
Pages (from-to)3247-3253
Number of pages7
JournalCellulose
Volume26
Issue number5
DOIs
Publication statusPublished - 30 Mar 2019
MoE publication typeNot Eligible

Fingerprint

Styrene
Composite films
Cellulose
Cellulose films
Spectrum analysis
Polymers
Composite materials
poly(3,4-ethylene dioxythiophene)

Keywords

  • Charge transport
  • Composite films
  • Conducting polymers
  • Nanofibrillar cellulose
  • Terahertz spectroscopy

Cite this

Unuma, Takeya ; Kobayashi, Omou ; Hamdany, Iffah F.A. ; Kumar, Vinay ; Saarinen, Jarkko J. / Terahertz complex conductivity of nanofibrillar cellulose-PEDOT:PSS composite films. In: Cellulose. 2019 ; Vol. 26, No. 5. pp. 3247-3253.
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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.].",
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Terahertz complex conductivity of nanofibrillar cellulose-PEDOT:PSS composite films. / Unuma, Takeya; Kobayashi, Omou; Hamdany, Iffah F.A.; Kumar, Vinay; Saarinen, Jarkko J.

In: Cellulose, Vol. 26, No. 5, 30.03.2019, p. 3247-3253.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

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.

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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.].

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KW - Conducting polymers

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KW - Terahertz spectroscopy

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