Selective gas sensing with pristine graphene

It has been known for some time that graphene can be used for detection of individual gas molecules adsorbed on its surface. Back in 2007, the discoverers of graphene, Andre Geim and Kostya Novoselov, already reported a graphene sensor that can detect just a single molecule of a toxic gas  In that work, the researchers have shown that gas molecules gently attach themselves to graphene without disrupting its chicken wire structure. They only add or take away electrons from graphene, which results in notable changes in its electrical conductance.


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