Breakthrough in Gas Safety Technology
Scientists at the School of Physics, IISER Thiruvananthapuram, have developed a miniaturised, low-power smart sensor that can detect traces of explosive hydrogen and toxic nitrogen dioxide at room temperature. The research, supported by the Department of Science & Technology (DST) under its Nano Mission program, addresses a critical gap in gas safety monitoring.
Why Hydrogen Detection Matters
Hydrogen is emerging as a clean fuel for industry, transportation, and power. However, its highly flammable nature makes leak detection vital. Traditional hydrogen sensors consume high energy and require elevated operating temperatures, making them unsuitable for portable or IoT-based use.
The New Sensor’s Edge
- Operates efficiently at room temperature.
- Uses nickel oxide (NiO) nanostructures combined with zinc oxide (ZnO) nanoparticles to form highly sensitive pn junctions.
- Capable of detecting hydrogen and nitrogen dioxide with high selectivity and speed.
- Low-cost alternative to conventional palladium-based sensors (nickel is 1/10th the price of palladium).
Applications Across Sectors
The smart sensor has immense potential in:
- Clean Energy: Real-time hydrogen leak detection in fuel stations and vehicles.
- Defence & Aerospace: Lightweight, portable sensors for safety-critical environments.
- Environmental Monitoring: Detecting nitrogen dioxide and volatile organic compounds in urban air.
Next Steps in Innovation
The research team is advancing towards ultra-low power and self-powered sensor devices using atomically thin material-based heterostructures. These new designs, fabricated with CMOS-compatible methods, will enable scalable manufacturing and AI-assisted smart sensing.
A Leap for Atmanirbhar Bharat
This innovation reflects India’s growing leadership in green technology and IoT-driven safety systems. By combining affordability, scalability, and cutting-edge nanotechnology, the sensor opens pathways for global applications while advancing India’s clean energy transition.
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