Researchers from Rice University and the Technion-Israel Institute of Technology today developed a new method to produce very pure graphene. The idea is to dissolve graphite in chlorosulphonic acid, a common industrial solvent. Using new methods to measure the aggregation of the dissolved graphene flakes, individual graphene layers in the graphite peeled apart spontaneously.

The team was able to dissolve as much as two grams of graphene per liter of acid to produce solutions at least 10 times more concentrated than existing methods.