Advancement in Functionalized Electrospun Nanofiber-Based Gas Sensors: A Review

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Electrospinning is revolutionizing nanoengineering for gas-sensing materials.
• Nanofibers from metal oxides, carbon, or polymers show high surface area, porosity, and stability.
• Expanding gas sensor applications (IoT, food, medical) demand higher performance.

Purpose of the Study:

• To review nanostructures, gas-sensing properties, and mechanisms of modified nanofibers.
• To explore functionalized nanofiber strategies for enhanced gas sensor performance.
• To discuss future perspectives and challenges in electrospun nanofibers for gas sensing.

Main Methods:

• Systematic review of literature on electrospun nanofibers for gas sensing.
• Analysis of functionalization strategies (in electrospinning and post-treatment).
• Evaluation of nanostructure-property relationships in modified nanofibers.

Main Results:

• Functionalized nanofibers demonstrate significantly enhanced gas-sensing performance.
• Specific surface area, porosity, and stability are key properties influenced by modification.
• Various functionalization approaches effectively improve sensor response and selectivity.

Conclusions:

• Modified electrospun nanofibers are promising for advanced gas sensing.
• Functionalization strategies are crucial for meeting high-performance demands.
• Further research is needed to address challenges and unlock full potential.