Electrically controlled adsorption of oxygen in bilayer graphene devices

Yoshiaki Sato; Kazuyuki Takai; Toshiaki Enoki

doi:10.1021/nl202002p

Electrically controlled adsorption of oxygen in bilayer graphene devices

Nano Lett. 2011 Aug 10;11(8):3468-75. doi: 10.1021/nl202002p. Epub 2011 Jul 25.

Authors

Yoshiaki Sato¹, Kazuyuki Takai, Toshiaki Enoki

Affiliation

¹ Department of Chemistry, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan.

PMID: 21766857
DOI: 10.1021/nl202002p

Abstract

We investigate the chemisorptions of oxygen molecules on bilayer graphene (BLG) and its electrically modified charge-doping effect using conductivity measurement of the field effect transistor channeled with BLG. We demonstrate that the change of the Fermi level by manipulating the gate electric field significantly affects not only the rate of molecular adsorption but also the carrier-scattering strength of adsorbed molecules. Exploration of the charge transfer kinetics reveals the electrochemical nature of the oxygen adsorption on BLG.