Fig. 1
From: Chemical and biological sensors based on defect-engineered graphene mesh field-effect transistors
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40580-016-0075-9/MediaObjects/40580_2016_75_Fig1_HTML.gif)
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