Strategic engineering of D-band center and oxygen vacancy in In6WO12−xSx for ultrahigh signal-to-noise ratio gas sensing at parts-per-billion level NO2

Key Points

• Gas sensing shows improved sensitivity for NO2 detection with a signal-to-noise ratio exceeding 100:1.
• Key evidence reveals that tuning the D-band center and oxygen vacancies significantly impacts gas perception in semiconductors.
• Assessment using advanced materials engineering techniques allows for precise modifications to the properties of In6WO12−xSx.
• Highlights the potential for practical applications in environmental monitoring and air quality management.