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The nature of mass transport in plants has recently inspired the development of low-cost and sustainable wood-based electronics. Herein, we report a wood electrochemical transistor (WECT) where all three electrodes are fully made of conductive wood (CW). The CW is prepared using a two-step strategy of wood delignification followed by wood amalgamation with a mixed electron-ion conducting polymer, poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate (PEDOT:PSS). The modified wood has an electrical conductivity of up to 69 Sm-1 induced by the formation of PEDOT:PSS microstructures inside the wood 3D scaffold. CW is then used to fabricate the WECT, which is capable of modulating an electrical current in a porous and thick transistor channel (1 mm) with an on/off ratio of 50. The device shows a good response to gate voltage modulation and exhibits dynamic switching properties similar to those of an organic electrochemical transistor. This wood-based device and the proposed working principle demonstrate the possibility to incorporate active electronic functionality into the wood, suggesting different types of bio-based electronic devices. [ABSTRACT FROM AUTHOR]

Composites, conductivity, energy, polypyrrole, sulfonated wood Strong and lightweight wood/polypyrrole porous composites preserving native wood cellular structure are fabricated and exhibit high conductivity and capacitive performance, showing potential as sustainable alternatives for energy applications. Keywords: composites; conductivity; energy; polypyrrole; sulfonated wood EN composites conductivity energy polypyrrole sulfonated wood 1 1 1 01/10/23 20230101 NES 230101 B Conductive Wood-Based Composites b Controlled lignin sulfonation in wood structure as an interface tailoring approach allows enhanced integration of conducting polymers in wood cell wall as reported by Gabriella G. Mastantuoni, Lars A. Berglund, Qi Zhou, and co-workers in article number 2201597. [Extracted from the article]