Figure 1
From: A Novel Solid-State Thermal Rectifier Based On Reduced Graphene Oxide

(a) Photograph of the rGO paper. (b) Surface profile of rGO paper under SEM. (c) Cross section image of rGO paper under SEM. The thickness is ∼50 um. (d) EDX spectrum of rGO paper. There remains little oxygen atoms. (e) Schematic view of the measure system. A triangular rGO structure is tested. (f) Schematic view of the devices.