4-(Hexafluoro-2-hydroxy isopropyl)aniline functionalized highly sensitive flexible SWCNT sensor for detection of nerve agent simulant dimethyl methylphosphonate
| Autor: | P.K. Chaudhury, R. P. Tandon, J. S. Rawat, Pika Jha, Abhilasha Chouksey, Deepak Kumar |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Dimethyl methylphosphonate 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound Adsorption Aniline chemistry Chemical engineering law Surface modification Organic chemistry General Materials Science 0210 nano-technology Luminescence Selectivity Isopropyl |
| Zdroj: | Materials Chemistry and Physics. 181:487-494 |
| ISSN: | 0254-0584 |
| Popis: | Dimethyl methylphosphonate (DMMP) is widely used as a simulant of nerve agent Sarin, which is an organophosphorus compound. In the present work, flexible single walled carbon nanotube (SWCNT) resistive sensor is functionalized with 4-(Hexafluoro-2-hydroxy isopropyl)aniline (HFiP-1) to enhance the response of the sensor towards DMMP vapors. Sensing properties of pristine and HFiP-1 functionalized flexible SWCNT resistive sensors for DMMP vapors are investigated at room temperature. The response of HFiP-1 functionalized sensor is enhanced towards DMMP due to the presence of strong hydrogen-bonding between the organophosphonate and HFiP-1. The response of functionalized sensor is 16.0% for 24 ppm of DMMP and increased 3.7 folds as compared to pristine sensor. The observed results indicate that, HFiP-1 plays a significant role in enhancement of SWCNT film sensor response towards DMMP. In addition, the flexible sensor fabricated by vacuum filtration method and functionalized using drop cast method gives repeatable response over five cycles that have been studied. |
| Databáze: | OpenAIRE |
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