Diffusion of O2 and N2 through thin and thick SWNT networks

TL;DR

This study investigates how thin and thick single-walled carbon nanotube networks respond electrically to N2 and O2 gases, revealing that O2 causes a larger conductance increase, especially in thin, semiconducting networks.

Contribution

It provides new insights into the differential gas responses of SWNT networks based on their thickness and semiconducting properties.

Findings

O2 exposure increases conductance more than N2 in both network types.

Thin SWNT networks respond more strongly than thick ones.

Semiconducting nature enhances sensitivity to gas adsorption.

Abstract

We report the electrical responses of thin and thick single-walled carbon nanotube (SWNT) networks to N2 and O2 adsorption. In the surface desorbed state exposure to N2 and O2 provide an increase in conductance of thin and thick SWNT networks. The increase in conductance of both thin and thick networks is of a greater magnitude during O2 exposure rather than N2 exposure. Thin networks exhibit a greater response to both O2 and N2 rather than thick networks. This is likely a result of the increased semiconducting nature of thin SWNT networks.