Principles of detection mechanism for adsorbed gases using carbon nanotube nanomat

In this study, we fabricated carbon nanotube films for application to gas sensors. We assumed that the ratio of electrical conductance change was equal to the surface coverage, and our detection model verified this assumption. To prove this assumption, we simulated the sheet resistance of a film with numerous joints. Our Monte Carlo simulations proved that when the joint resistance increased owing to molecular adsorption, the sheet resistance increased in accordance with the surface coverage.