Fabrication of single- and multilayer MoS 2 film-based field-effect transistors for sensing NO at room temperature

Abstract

Single- and multilayer MoS 2 films are deposited onto Si/SiO 2 using the mechanical exfoliation technique. The films were then used for the fabrication of field-effect transistors (FETs). These FET devices can be used as gas sensors to detect nitrous oxide (NO). Although the single-layer MoS 2 device shows a rapid response after exposure to NO, the current was found to be unstable. The two-, three-, and four-layer MoS 2 devices show both stable and sensitive responses to NO down to a concentration of 0.8 ppm. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.