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. Author manuscript; available in PMC: 2013 Mar 20.
Published in final edited form as: Nat Mater. 2011 Nov 20;11(2):120–125. doi: 10.1038/nmat3169

Figure 4. Flexible and semitransparent topgate monolithic graphene-graphite FET arrays.

Figure 4

a, Schematic illustration of the device layout. b, Photograph (main panel) of the devices wrapped on a cylindrical glass (radius of curvature: 1.2 cm). The device rested on a paper printed with a logo, to demonstrate the semitransparent characteristics of the monolithic graphene-graphite devices (left inset). Scale bars, 4 mm. Optical micrograph of the topgate FET arrays (right image). Scale bar, 200 μm. The blue arrow presents the topgate line, and the red arrow indicates the S/D with interconnects. c, Statistic distributions of charge neutrality point (left panel) and transconductance at n-(center) and p- (right) type regimes. d, ID-VG curve of the topgate FET measured when the substrate is flat and bent (radius of curvature: 0.7 cm).