Role of electric field in the carbon dioxide adsorption on the graphene nanoribbon

Graphene is a most attractive candidate for high sensitivity gas sensor because graphene has highest surface-to-volume ratio and low 1/f noise. In the graphene nanoribbon devices, source, drain, and gate electrodes are present nearer to the channel. Presence of these electrodes modifies the electric field in the channel regions, which will affect the molecules adsorption. In order to understand the real time molecules adsorption phenomena, we have performed classical molecular dynamics simulation of carbon dioxide adsorption on the graphene nanoribbon in the presence of different electrodes. It was found that the presence of electrodes plays a significant role in the molecules adsorption.

Acknowledgement: This work is supported by Grant-in-Aid for Scientific Research (S) No. 25220904 from Japan Society for the Promotion of Science.