Thin partially reduced oxide-graphene films: structural, optical, and electrical properties

Abstract

High-resistive (1012 Ohm/□) oxide-graphene films with thickness varying from 5 nm to several micrometers were produced and studied. Films of 5–150 nm on glass had a transparency of 93–98% for wave-lengths of 400–700 nm, while the transparency of a suspended film with an area of 2–3 cm2 and thickness of 200–400 nm amounted to 82–90%. The durable reduction of such films in hydrazine vapor results in a resistance decrease to 104 Ohm/□. A new approach is proposed which allows us to reduce in hydrazine vapor only the upper layers of an oxide-graphene film and form thin-film structures comprising conducting and insulating layers. The films are promising for a wide spectrum of optical and electronic applications, including flexible electronics.