4.6 Article

Difference in Gas-Sensing behavior of Multi-walled carbon Nanotube-Paper-Based gas sensor to polar and non-Polar organic solvents

Journal

CHEMICAL PHYSICS LETTERS
Volume 798, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.cplett.2022.139596

Keywords

Gas sensor; IUPAC; Carbon nanotube; Polar; Non-polar

Funding

  1. CSC [202008050230]
  2. JSPS KAKENHI [JP20H02086]
  3. Japan Science and Technology Agency (JST) [JPMJTM20G1]

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This study prepared a multi-walled carbon nanotube paper through filtration and tested its gas-sensing ability towards polar and non-polar organic solvents. The adsorption of non-polar solvents exhibited multilayered behavior, possibly due to the measurement temperature exceeding the critical gas temperature and preventing the formation of a stable adsorption layer.
Herein, we prepared a multi-walled carbon nanotube (MWCNT) paper by filtration, and tested its gas-sensing ability toward polar and non-polar organic solvents by comparing the magnitude of the adsorption sensitivity, response time, and reproducibility. The adsorption of non-polar organic solvents showed multilayered behavior; we presume that a stable adsorption layer is prevented from being formed owing to the measurement temperature used being higher than the critical gas temperature.

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