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Exfoliation at the Liquid/Air Interface to Assemble Reduced Graphene Oxide

Abstract


Reduced graphene oxide ultrathin films are fabricated by a reproducible exfoliation method at the liquid/air interface, and they show high transparency, tunable sheet resistance, uniform electric conductivity, and structural homogeneity over a large area. A flexible relative humidity sensing matrix is demonstrated and it is shown to be excellent for close proximity sensing without touching it. This method opens up a novel avenue for future human–machine interaction applications.