Self-Assembled 1-Octadecanethiol Membrane on Pd/ZnO for a Selective Room Temperature Flexible Hydrogen Sensor

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Sensing

Background:

• Development of efficient room-temperature hydrogen sensors is critical for clean energy technologies.
• Existing palladium/zinc oxide (Pd/ZnO) sensors often face challenges with response and selectivity.

Purpose of the Study:

• To fabricate a flexible hydrogen sensor using self-assembled 1-octadecanethiol on Pd/ZnO nanoparticles.
• To enhance sensor response and selectivity at room temperature for hydrogen detection.

Main Methods:

• Fabrication of a palladium film via DC sputtering.
• Annealing to form uniform, surfactant-free palladium nanoparticles.
• Integration with a polymer membrane for selective gas detection.

Main Results:

• Achieved enhanced sensor response towards hydrogen gas at room temperature.
• Demonstrated high selectivity, suppressing interference from methane, moisture, ethanol, and acetone.
• Sensor performance surpassed previously reported room-temperature Pd/ZnO sensors.

Conclusions:

• A viable, low-cost fabrication method for flexible hydrogen sensors was established.
• The developed sensor shows significant potential for hydrogen-powered vehicles and clean energy applications.
• Uniform palladium nanoparticles and polymer membrane integration are key to enhanced performance and selectivity.