Detecting Ammonia Fast

Detecting Ammonia Fast

Author: David Bradley

Graphene resembles a single layer of graphite. It is being explored as a potential sensor material, among other applications, because each carbon atom is effectively a surface atom exposed to gaseous analytes.

US researchers have exploited this property to build a transistor device based on a graphene material that operates under a positive gate potential. The device gives an instantaneous response on exposure to ammonia gas and is far superior to devices that work with a negative gate potential. The device behavior is reproducible and amenable to real-world gas-sensing applications.


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