Recent Advances in Emerging 2D Material-Based Gas Sensors: Potential in Disease Diagnosis

2D materials are gaining great attention owing to their superior electrical, optical, and mechanical characteristics. In recent decades, 2D materials have demonstrated significant potential for the identification of disease-related biomarkers based on semiconductor gas sensors. Herein, the recent progress of semiconductor gas sensors fabricated by 2D materials covering graphene, black phosphorus, transition metal dichalcogenides, MXenes, metal-organic frameworks, metal oxide nanosheets, etc. is clearly described. First, the basic attributes of 2D materials are described, and their gas-sensing mechanisms are also summarized. Second, the ability of 2D material-based sensors in the detection of disease-related gas molecules is also highlighted. Finally, some effective methods for enhancing the gas-sensing performance of 2D materials are discussed, and the opportunities and challenges accompanying are also presented. This work could provide new avenues for material synthesis, sensor development, medical diagnosis, and the related fields.