August 21, 2025Open Access

Interface-Protected Subsurface Vacancies for Room-Temperature Sub-ppm SO2 and NO2 Detection in MoS2, MoSe2, and MoTe2 via Electron Irradiation

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Defect-engineering boosts adsorption and carrier modulation for SO2 and NO2 in TMDs, highlighting gas sensor potential.

Detection sensitivity for SO2 and NO2 improves significantly with subsurface vacancies in MoS2, MoSe2, and MoTe2.
MoTe2 achieved up to 350% carrier modulation for NO2 at 2% vacancy density, showcasing its specific capabilities.
Density functional theory calculations support findings on the role of defect sites in adsorption and charge transfer.
Subsurface vacancy engineering presents a scalable method for enhancing the selectivity of gas sensors in TMD materials.

Maciej J. Szary (2025) studied this question.

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