Journal article
2D MXene electrochemical transistors
NANOSCALE, v 16(6), p2883
08 Feb 2024
PMID: 38259225
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The solid-state field-effect transistor, FET, and its theories were paramount in the discovery and studies of graphene. In the past two decades another transistor based on conducting polymers, called organic electrochemical transistor (ECT), has been developed and largely studied. The main difference between organic ECTs and FETs is the mode and extent of channel doping; while in FETs the channel only has surface doping through dipoles, the mixed ionic-electronic conductivity of the channel material in organic ECTs enables bulk electrochemical doping. As a result, organic ECTs maximize conductance modulation at the expense of speed. To date ECTs have been based on conducting polymers, but here we show that MXenes, a class of 2D materials beyond graphene, enable the realization of electrochemical transistors (ECTs). We show that the formulas for organic ECTs can be applied to these 2D ECTs and used to extract parameters like mobility. These MXene ECTs have high transconductance values but low on-off ratios. We further show that conductance switching data measured using ECT, in combination with other in situ-ex situ electrochemical measurements, is a powerful tool for correlating the change in conductance to that of the redox state, to our knowledge, this is the first report of this important correlation for MXene films. 2D ECTs can draw great inspiration and theoretical tools from the field of organic ECTs and have the potential to considerably extend the capabilities of transistors beyond those of conducting polymer ECTs, with added properties such as extreme heat resistance, tolerance for solvents, and higher conductivity for both electrons and ions than conducting polymers. Here we show that not only conducting polymers, but also 2D MXenes can be used as materials for electrochemical transistors ECTs. MXene extend the capabilities of ECTs with properties such as extreme heat resistance, and higher conductivity/speeds.
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Details
- Title
- 2D MXene electrochemical transistors
- Publication Details
- NANOSCALE, v 16(6), p2883
- Publisher
- ROYAL SOC CHEMISTRY; CAMBRIDGE
- Grant note
- MinA acknowledges funding from AForsk project 18-461. J. S. acknowledges funding from Olle Engkvists Stiftelse, project 213-0253. M. H. acknowledges funding from Swedish Energy Agency (Energimyndigheten), project 48489-1. This project has received funding from the European Union's Horizon 2020 Research and Innovation program under the Marie Sklodowska-Curie grant agreement No 101025599. E. Z. gratefully acknowledges the Goran Gustafsson Foundation, the Swedish Research Council (Grant No. 2022-02855), and Formas - a Swedish Research Council for Sustainable Development (Grant No. 2022-00374) for support. This work was supported by AIMES - The center for integrated medical and engineering sciences (www.aimes.se), Karolinska Institutet (1-249/2019), KTH Royal Institute of Technology (VF-2019-0110), and Getinge AB (4.1599/2018). This work was partially supported by the Wallenberg Initiative Materials Science for Sustainability (WISE) funded by the Knut and Alice Wallenberg Foundation.
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Drexel University
- Web of Science ID
- WOS:001146850800001
- Scopus ID
- 2-s2.0-85183520009
- Other Identifier
- 991021861298904721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied