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Understanding gas flow behavior is crucial in the ability of materials to sense toxic gasses for environmental, industrial, safety, agriculture, and related applications. Conventional metal oxide-based gas sensors such as SnO2 and TiO2, suffer from poor stability at higher operating temperatures, and can degrade with exposure to higher levels of humidity. Two - dimensional (2D) materials serve as a promising candidate for gas sensing studies because of their large surface area-tovolume ratio, ease of surface functionalization, and the relative simplicity in their integration with microelectronics fabrication approaches within a planar 3D device architecture. In particular, the microstructure of solution-processed graphene appears to be well-suited to surface adsorption processes, as one of the governing mechanisms in devices that are candidates for gas sensing, given its more porous microstructure compared to vapor synthesized materials. In our work we report on here, we measure the electrical transport characteristics of ink jet printed graphene to incoming gas flow, specifically to N2 and CO2. This work serves as a prototypical platform to study the device characteristics of solution processed graphene and other 2D materials for more exotic gases in the future for gas sensing applications.
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