Terahertz complex conductivity of cellulose nanocrystal based composite films controlled with PEDOT:PSS blending ratio

Takeya Unuma; Omou Kobayashi; Shoya Kotaka; Rajesh Koppolu; Martti Toivakka; Jarkko J. Saarinen

doi:10.1007/s10570-020-03464-4

Terahertz complex conductivity of cellulose nanocrystal based composite films controlled with PEDOT:PSS blending ratio

Takeya Unuma, Omou Kobayashi, Shoya Kotaka, Rajesh Koppolu, Martti Toivakka, Jarkko J. Saarinen

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Abstract

We investigate the terahertz complex conductivity spectra of cellulose nanocrystal (CNC) based composite films fabricated with different blending ratios of the conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and without/with glycerol additive. A partially localized nature of carriers in the composite is clearly seen in the obtained spectral shapes of complex conductivity and is well described by an extended Drude model. We find that the carriers become denser and less localized with increasing PEDOT:PSS blending ratio and that the addition of glycerol to the composite is efficacious in enhancing carrier delocalization as well as mechanical flexibility.

Original language	English
Pages (from-to)	10019–10027
Journal	Cellulose
Volume	27
Issue number	17
DOIs	https://doi.org/10.1007/s10570-020-03464-4
Publication status	Published - 23 Sept 2020
MoE publication type	A1 Journal article-refereed

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10.1007/s10570-020-03464-4

Cellulose2020904.pdfAccepted author manuscript, 407 KBLicence: Publisher rights policy

Åbo Akademi Functional Printing Center
Toivakka, M. (PI), Rosenholm, J. (PI), Anttu, N. (PI), Bobacka, J. (PI), Huynh, T. P. (PI), Peltonen, J. (PI), Wang, X. (PI), Wilen, C.-E. (PI), Xu, C. (PI), Zhang, H. (PI) & Österbacka, R. (PI)
Faculty of Science and Engineering
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title = "Terahertz complex conductivity of cellulose nanocrystal based composite films controlled with PEDOT:PSS blending ratio",

abstract = "We investigate the terahertz complex conductivity spectra of cellulose nanocrystal (CNC) based composite films fabricated with different blending ratios of the conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and without/with glycerol additive. A partially localized nature of carriers in the composite is clearly seen in the obtained spectral shapes of complex conductivity and is well described by an extended Drude model. We find that the carriers become denser and less localized with increasing PEDOT:PSS blending ratio and that the addition of glycerol to the composite is efficacious in enhancing carrier delocalization as well as mechanical flexibility.",

author = "Takeya Unuma and Omou Kobayashi and Shoya Kotaka and Rajesh Koppolu and Martti Toivakka and Saarinen, {Jarkko J.}",

note = "paf Published: 23 September 2020 accepted version 12 m{\aa}n Mail {\aa}t Toivakka & Koppolu [6.10.2020 LN] Added vol # & pages [16.12.2020 MT]",

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doi = "10.1007/s10570-020-03464-4",

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T1 - Terahertz complex conductivity of cellulose nanocrystal based composite films controlled with PEDOT:PSS blending ratio

AU - Unuma, Takeya

AU - Kobayashi, Omou

AU - Kotaka, Shoya

AU - Koppolu, Rajesh

AU - Toivakka, Martti

AU - Saarinen, Jarkko J.

N1 - paf Published: 23 September 2020 accepted version 12 mån Mail åt Toivakka & Koppolu [6.10.2020 LN] Added vol # & pages [16.12.2020 MT]

PY - 2020/9/23

Y1 - 2020/9/23

N2 - We investigate the terahertz complex conductivity spectra of cellulose nanocrystal (CNC) based composite films fabricated with different blending ratios of the conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and without/with glycerol additive. A partially localized nature of carriers in the composite is clearly seen in the obtained spectral shapes of complex conductivity and is well described by an extended Drude model. We find that the carriers become denser and less localized with increasing PEDOT:PSS blending ratio and that the addition of glycerol to the composite is efficacious in enhancing carrier delocalization as well as mechanical flexibility.

AB - We investigate the terahertz complex conductivity spectra of cellulose nanocrystal (CNC) based composite films fabricated with different blending ratios of the conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and without/with glycerol additive. A partially localized nature of carriers in the composite is clearly seen in the obtained spectral shapes of complex conductivity and is well described by an extended Drude model. We find that the carriers become denser and less localized with increasing PEDOT:PSS blending ratio and that the addition of glycerol to the composite is efficacious in enhancing carrier delocalization as well as mechanical flexibility.

U2 - 10.1007/s10570-020-03464-4

DO - 10.1007/s10570-020-03464-4

M3 - Article

SN - 0969-0239

VL - 27

SP - 10019

EP - 10027

JO - Cellulose

JF - Cellulose

IS - 17

ER -

Terahertz complex conductivity of cellulose nanocrystal based composite films controlled with PEDOT:PSS blending ratio

Abstract

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