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GAS SENSORS

The rapid urbanization and the release of harmful gases from industries and automobiles have resulted in many health issues. Among the hazardous pollutants present in industrial and automobile exhaust, Nitrogen dioxide (NO2) is a particularly hazardous one, causing airway inflammation, bronchoconstriction, and reduced lung function in children. These effects can lead to the onset of asthma attacks in children at an early age. The fact that NO2 is colorless and odorless at lower temperatures and room temperature makes it undetectable by human senses. Therefore, developing high-performance sensors to accurately and rapidly detect NO2 gas at room temperature is essentially important to protect human health and environment.

In this regard, we are constructing room temperature NO2 gas sensor based on Metal oxide Semiconductor (MOS) and Transition Metal Dichalcogenides (TMDs) via wet chemical and physical techniques. To improve the sensing performance, we are using various strategies such as making heterostructures, doping with different metals, noble metal decoration, composite with carbon-based materials and liquid exfoliation.

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