Issue 37, 2021

PEDOT percolation networks for reversible chemiresistive sensing of NO2

Abstract

Detection of NO2 plays an important role in various safety applications. However, sensitive and reversible sensing of NO2 remains a challenge. Here we demonstrate the use of poly(3,4-ethylenedioxythiophene) (PEDOT) conducting polymer percolation networks for chemiresistive sensing of NO2. By adjusting the electrochemical polymerisation and doping conditions of the polymer, we show control over the relative contributions of oxidised and over-oxidised PEDOT to the sensing behaviour. Reversible NO2 sensors using only PEDOT as the sensor material are demonstrated. By operating the sensor near the electrical percolation threshold, a higher sensitivity is achieved compared to more traditional thin film based chemiresistive sensors. A limit of detection of 907 ± 102 ppb was achieved.

Graphical abstract: PEDOT percolation networks for reversible chemiresistive sensing of NO2

Article information

Article type
Paper
Submitted
10 5 2021
Accepted
21 6 2021
First published
28 6 2021
This article is Open Access
Creative Commons BY license

RSC Adv., 2021,11, 22789-22797

PEDOT percolation networks for reversible chemiresistive sensing of NO2

M. J. Lefferts, B. I. Armitage, K. Murugappan and M. R. Castell, RSC Adv., 2021, 11, 22789 DOI: 10.1039/D1RA03648C

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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