“…Indeed, in the literature many models are presented for gas sensors based on CNTs [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ] but the majority of them treat single CNT devices (usually FETs) [ 22 , 23 , 24 , 25 , 26 ] or they do not arrive to an implementable mathematical model [ 27 ] and all those models are related to static conditions. A few models are developed for chemiresistors based on CNT networks [ 20 , 21 ], but these provide only a static description of their behavior, and the relationship between the transport mechanism and the chemical behavior is not based on a physical interpretation.…”