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

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.

Automated summary

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.