Field effect gas sensors adsorb gas molecules (e.g. O₂, NO_x, CO, CO₂) at the semiconductor surface which results in an interface charge density. Consequently, the magnitude of the current in these electronic devices changes.

Such sensors will be required in future exhaust gas aftertreatment systems for the selective real time detection of pollutants. Restrictions on cost and device dimensions imposed by the automobile industry make semiconductor gas sensors promising candidates for the realization of cheap and small-size sensor devices.

• self-consistent Schrödinger and Poisson equations
• 1D, 2D, 3D
• Wolkenstein's charge transfer model (weakly and strongly chemisorbed states)
• More information: $interface-states

At present, we do not have any tutorials yet for gas sensor applications.
If you are interested in such topics, please contact stefan.birner [at] nextnano.de.
We are looking for research partners in that field.