PEDOT percolation networks for reversible chemiresistive sensing of NO2
| Autor: | Ben I. Armitage, Martin R. Castell, Krishnan Murugappan, Merel J. Lefferts |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Conductive polymer Materials science General Chemical Engineering Doping Percolation threshold Nanotechnology 02 engineering and technology General Chemistry Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry PEDOT:PSS Polymerization Percolation Thin film 0210 nano-technology |
| Zdroj: | RSC Advances. 11:22789-22797 |
| ISSN: | 2046-2069 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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