Fig. 1
From: Chemical and biological sensors based on defect-engineered graphene mesh field-effect transistors
a, b Schematic illustrations of (a) graphene patterning by nanosphere lithography and (b) direct synthesis of graphene mesh by a silica-assisted CVD. c, d Graphene contamination from residual polymers after lithography processes. e–g SEM images of directly grown graphene meshes having various hole dimensions. c Adapted with permission from Ref. [43], © American Chemical Society. d Adapted with permission from Ref. [44], © Elsevier. e–g Reproduced with permission from Ref. [30], © American Chemical Society