Researchers from the Irish nanoscience institute CRANN developed a new graphene-based sensor technology that could become a new platform for low-energy, remotely powered sensors for all sorts of applications. One such application, specifically mentioned by the researchers is air quality control systems in automobiles. Other applications may include bacteria and parasite detection and diseases diagnosis.
The researchers developed what they refer to as Chemically Modulated Graphene Diodes (or GDS). These are made from a single layer of graphene on silicon. The graphene is exposed to liquids or gases and the diode can be made (by different doping) so that various absorbates will transfer charge.