Metallurgical graphene under different gas atmospheres and UV radiation for gas-sensing applications

Abstract

Due to two-dimensional lattice and unique electrical properties graphene is a material of interest in gas-sensing applications. In contrast to theoretical structure, real-life graphene contains numerous defects that modify its properties. The aim of the following study was to compare the influence of five different gaseous atmospheres and UV radiation on the electrical resistance of metallurgical graphene (HSMG®). Samples of virgin graphene and graphene annealed after transfer were used. Among the tested gases, hydrogen atmosphere showed the biggest impact on graphene resistance. The annealing step meant to cleanse graphene from process residues resulted in decreased graphene susceptibility to UV radiation.