Functionalization of Suspended Graphene-based gas sensors array for NO2 gas sensing applications

Graphene-based gas sensors have garnered significant interest due to their exceptional surface-to-volume ratio, high electrical conductivity, and ultrahigh sensitivity. However, conventional graphene sensors are typically supported on a substrate, which limits gas adsorption to only one side, thereby reducing overall sensing efficiency. To address this limitation, we propose the development of a suspended graphene-based gas sensor, where the graphene is freely suspended in air, allowing it to interact with gas molecules from both the top and bottom surfaces. This dual-sided adsorption significantly enhances the sensor’s sensitivity, response time, and overall performance.

One of the key challenges in graphene-based gas sensing is selectivity—graphene’s intrinsic reactivity makes it susceptible to interactions with multiple gases, leading to cross-sensitivity issues. To overcome this, we will functionalize suspended graphene by selectively decorating metal or metal oxide nanoparticles (MO-NPs) with the spark ablation technique.

Assignment

• Design of mask for the gas sensors using L-edit
• Fabricate the graphene-based gas sensors
• Decorate graphene with metal oxide nanoparticles by spark ablation
• Room Temperature measurements using Characterization techniques and gas-sensing measurements

Requirements

You are a passionate student looking for discoveries in 2D materials such as graphene that can be crucial for sensor development and optimization, especially for environmental and agricultural applications. You have a background in one of these fields as engineering, physics, or material science.

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Last modified: 2025-02-13