Research on the oxygen and humidity related-electrical behavior of monolayer MoS₂ under vacuum to normal pressures

Abstract

Molybdenum disulfide (MoS 2 ) has recently gained tremendous research interest due to its distinctive properties. A comprehensive understanding of the performance of MoS 2 across a complete range of pressures is significant from the perspective of practical application. While extensive research has been conducted to explore the potential of MoS 2 under extremely high pressures, there is still a lack of deep insights into how it performs under vacuum to normal pressures. In this experimental study, we examine the electrical behavior of MoS 2 as the pressure varies from vacuum pressure to standard atmospheric pressure in N 2 and O 2 , respectively. The I-V measurements show that higher pressures induce faster oxygen adsorption of MoS 2 . In addition, the investigation into the effect of humidity reveals that humidity has a greater influence on the electrical behavior of MoS 2 than oxygen.