High-performance sensors based on molybdenum disulfide thin films.

Lee, Kangho; Gatensby, Riley; McEvoy, Niall; Hallam, Toby; Duesberg, Georg S · Adv Mater · 2013

basic_science · Level V

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Abstract

High-performance sensors based on molybdenum disulfide (MoS2 ) grown by sulfurization of sputtered molybdenum layers are presented. Using a simple integration scheme, it is found that the electrical conductivity of MoS2 films is highly sensitive to NH3 adsorption, consistent with n-type semiconducting behavior. A sensitivity of 300 ppb at room temperature is achieved, showing the high potential of 2D transition metal-dichalcogenides for sensing.