Fabrication and Characterization of Liquid Phase Exfoliated MoS2 Nanosheet for Gas Sensing Application

Due to its excellent chemical and electronic properties, two-dimensional MoS2 has emerged as a viable candidate for developing near-room temperature gas sensors with high selectivity and sensitivity. However, most of the reported sensors have synthesized the MoS2 sheet using chemical vapor phase deposition or hydrothermal method, which makes them unsuitable for large-scale sensor printing process. In this regard, we fabricate and characterize the n-type and p-type $M_{0} S_{2}$. based electrochemical sensors using the liquid phase exfoliation method for a superior NO2 sensor at near room temperature. Liquid phase exfoliation of MoS2 is one of the most simple and cost-effective method that could be more suitable for large-scale printing process. The synthesized MoS2 nanosheets were characterized by Zeta potential measurement, scanning electron microscopy (SEM), and Raman spectroscopy. The results show that the p-type MoS2 nanosheet offers a high response and good selectivity to NO2 gas at room temperature.