Design and simulation of graphene sensors to detect toxic gases

Gas sensors generally have the task of absorbing and detecting gas molecules on a sensitive material that in this paper, using zigzag type graphene nanotubes and Armchair type without applying gas and applying gas, will be simulated and analyzed using ATK software. Due to the characteristic electronic gas sensor including the voltage-current characteristic can detect the toxic molecules found in the tissues of the body. Selective toxic molecule In this article is Sulfur dioxide which is one of the known toxic gases and as a chemical compound in the form of gas at room temperature with the chemical formula SO2. By studying the results of simulations, can see the high sensitivity of the graphene nano-type armchair type than the zigzag type to detect the gas.