Direct printing of reduced graphene oxide on planar or highly curved surfaces with high resolutions using electrohydrodynamics

Abstract

Electrohydrodynamic inkjet printing of reduced graphene oxide (RGO) is demonstrated to form complex geometric devices with high resolution (line width ≈ 5 mm). Both planar and highly curved surfaces (radius of curvature ≈ 60 mm) can be used as substrates. Demonstrations of counterfeit coin recognition using RGO patterns and all-printed RGO transistors suggest substantial promise for applications in security and electronics.