Gas sensors based on graphene Comparison of two different fabrication approaches

摘要

Graphene's electronic properties are strongly affected by the adsorption of molecules making this material very attractive for gas sensing application.The present work investigates the use of graphene as gas sensing active layer. Herein, two different approaches to fabricate graphene conductometric sensors were persued: a mechanically exfoliated single graphene flake device and a thin film of chemically exfoliated graphene flakes device. First preliminary findings indicated the second approach as a promising and simple method to fabricate a graphene based chemiresistor. Electrical sensor characterizations towards N02 and moisture are shown. Issues related to fabrication processes are also discussed.