Additive-Enhanced SnO₂ FBG Sensor with Optimized Annealing Time, Temperature, and Multilayer Coating for...

Area of Science:

• Materials Science
• Nanotechnology
• Sensor Technology

Background:

• Nanostructure coatings are crucial for enhancing sensor sensitivity, stability, and response time.
• High surface-to-volume ratio and tunable porosity of nanostructures offer potential for improved sensor performance.
• Optimized nanostructure coatings are key to developing high-precision humidity sensing devices for industrial applications.

Purpose of the Study:

• To investigate the impact of annealing time, temperature, and coating layers on additive-enhanced tin dioxide (SnO2) nanostructures.
• To analyze how annealing affects the crystallinity, porosity, and moisture adsorption of SnO2 nanostructures.
• To evaluate the influence of multilayer coatings on the hygroscopic behavior of SnO2 nanostructures.

Main Methods:

• Additive-enhanced SnO2 nanostructures were subjected to varying annealing times and temperatures.
• Crystallinity, porosity, and moisture adsorption properties were analyzed under different annealing conditions.
• Hygroscopicity tests were performed on samples with optimized annealing and varying numbers of coating layers.

Main Results:

• Controlled annealing conditions were found to significantly enhance the hygroscopic properties of SnO2 nanostructures.
• Optimized annealing parameters improved crystallinity, porosity, and moisture adsorption capabilities.
• Multilayer coatings further enhanced moisture retention, demonstrating improved hygroscopic behavior.

Conclusions:

• Optimized annealing and multilayer coating strategies are effective in enhancing the performance of SnO2 nanostructures for humidity sensing.
• The developed SnO2 nanostructures exhibit promising moisture adsorption and desorption capabilities.
• These findings position SnO2 nanostructures as a viable material for advanced sensing applications, particularly in humidity monitoring.