title: Enhancement of methane gas sensing characteristics of graphene oxide sensor by heat treatment and laser irradiation.
abstract: The present study uses a rapid, easy and practical method for cost-effective fabrication of a methane gas sensor. The sensor was made by drop-casting a graphene oxide suspension onto an interdigital circuit surface. The electrical conductivity and gas-sensing characteristics of the sensor were determined and then heat treatment and in situ laser irradiation were applied to improve the device conductivity and gas sensitivity. Real-time monitoring of the evolution of the device current as a function of heat treatment time revealed significant changes in the conductance of the graphene oxide sensor. The use of low power laser irradiation enhanced both the electrical conductivity and sensing response of the graphene oxide sensor.
authors: Department of Physics, Shahid Beheshti University, Evin, Tehran 19839, Iran.
authors: Mohammadreza
authors: M
authors: Assar
authors: Department of Physics, Shahid Beheshti University, Evin, Tehran 19839, Iran. Electronic address: r_karimzadeh@sbu.ac.ir.
authors: Rouhollah
authors: R
authors: Karimzadeh
keywords: Graphene oxide; Heat treatment; Laser irradiation; Methane gas sensor