Graphene Sensing CO2

For years there has been a very poorly understood medical condition called Sick Building Syndrome (SBS) where someone who has spend a long time in an enclosed space (normally an office) begins to feel dizzy and short of breath. Many physiological and psychological suggestions have been put forward and one of them is that poisonous gasses in extremely small concentrations could be the cause. To see if this is possibly true the University of Southampton has designed a gas detector using graphene sheets that can detect CO2  and other organic compounds in concentrations of parts per billion (short scale) where most detectors famously work in parts per million. The system works by measuring the resistance of the graphene and when a chemical reacts with it it either joins of takes away a carbon and the difference in resistance is different  for each chemical. This is what allows the detector to sense both type and quantity of chemical involved within minutes of a test volume being released near it. The brilliance of this invention, however, is the fact it runs on between 3 to 6 volts and so can easily be installed in a home with very little affect on overall electricity cost.


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