Fig. 3
Process adopted in ref.25 to create subnanometric pores of controlled shape in a layer of graphene. The unspoiled graphene (a) is subjected to ions bombardment with gallium ions (b) that generates reactive defect sites (c). Exposure to acidic potassium permanganate etchant completes the nanopores (d). (Figures reprinted adapted with permission from ref. 25 Copyright 2014 American Chemical Society)
