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

Research output: Contribution to journalArticleScientificpeer-review

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 languageEnglish
Pages (from-to)10019–10027
JournalCellulose
Volume27
Issue number17
DOIs
Publication statusPublished - 23 Sep 2020
MoE publication typeA1 Journal article-refereed

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