Chemical Sensors

20 04 2011

Following the gas sensor findings from a few weeks ago, where we showed that we can make an array that can discriminate between species in a mixture, rather than just the overall level, our first graphene results have landed. Whilst we wait for the gas rig to be fixed (the BOC fairy dropped off a new cylinder and we took the opportunity to install the closed loop pressure system) our graphene sensors have been tested for their sensitivity to solvents.

Graphene solvent sensitivity sensor

Room temperature sensitivity to solvents

As expected this shows a difference between polar and non polar solvents and the next step is to try this with more realistic gas conditions to understand how it can function as something like an air quality monitor. Then we need to work out how we can make an array, so it might well be back to the idea behind the SiC arrays!