Drift-corrected nanoplasmonic hydrogen sensing by polarization

Area of Science:

• Nanotechnology
• Materials Science
• Sensor Technology

Background:

• Accurate hydrogen sensors are crucial for the widespread adoption of hydrogen as a fuel and energy storage solution.
• Hydrogen fuel cell vehicles require numerous sensors for safe operation, necessitating reliable and long-term sensor performance.

Purpose of the Study:

• To develop a drift-correction strategy for plasmonic sensors to ensure their long-term usability.
• To enhance the reliability of hydrogen sensors for applications like fuel cell vehicles.

Main Methods:

• A drift-correction concept based on light polarization was introduced.
• The method utilizes symmetric sensor and sensing material nanoparticles arranged in a heterodimer.
• A gold sensor element couples to a palladium sensing element in a polarization-dependent manner.

Main Results:

• The perpendicular polarization readout effectively corrects drifts caused by sensor element changes or temperature variations.
• Simultaneous readout of both polarization signals allows for continuous correction of sensor response, mitigating drift and aging.
• The approach is generic and applicable to various nanoplasmonic sensor applications beyond hydrogen sensing.

Conclusions:

• The developed polarization-based drift-correction method significantly enhances the long-term stability and reliability of plasmonic sensors.
• This technology is vital for the safe and effective deployment of hydrogen fuel technologies.
• The generic nature of the approach broadens its applicability to diverse nanoplasmonic sensing fields.