Metal-Organic Framework Coated Devices for Gas Sensing.

Area of Science:

• Materials Science
• Chemical Engineering
• Environmental Science

Background:

• Growing demand for air quality monitoring and disease diagnostics drives gas sensor development.
• Metal-organic frameworks (MOFs) offer tunable properties for advanced sensing applications.
• MOF-coated sensors demonstrate high sensitivity and selectivity for various gases.

Purpose of the Study:

• To review recent progress in MOF-based gas sensing devices.
• To summarize MOF-coated sensors based on different working principles.
• To correlate MOF characteristics with sensing performance.

Main Methods:

• Chemiresistive sensors
• Capacitive sensors
• Field-effect transistors (FETs) / Kelvin probes (KPs)
• Electrochemical sensors
• Quartz crystal microbalance (QCM) sensors

Main Results:

• MOF coatings enhance sensor sensitivity and selectivity.
• Surface chemistry and structure are key to MOF sensor performance.
• Diverse MOF-based devices show promise for specific gas detection.

Conclusions:

• MOF-coated sensors represent a significant advancement in gas sensing technology.
• Further research is needed to address challenges for practical, long-term applications.
• The designability of MOFs offers vast potential for future sensor development.