: A graphene (Gr) on a polyimide (PI) polymer\udfilm (Gr−PI film), obtained by a direct peel-off technique, is\udproposed and investigated. Thanks to its high transparency,\udelectrical conductivity, mechanical strength, and chemical\uddurability, the Gr−PI film is an ideal substrate for flexible\udelectronic and optoelectronic devices, including transistors, lightemitting\uddiodes, and plasmonic antennas. It is obtained using a\udstraightforward method. After spin coating and curing a PI film\udon Gr previously grown on Cu, one can separate the Gr−PI film\udfrom the Cu foil thanks to the difference in the adhesive energy\udbetween the Gr−Cu and Gr−PI interfaces. The resulting Gr−PI\udfilm shows an average electrical sheet resistance ranging from 520 to 860 Ω/sq and a very high optical transmission (>90%),\udwhich have allowed the demonstration of a transparent heater. The surface morphology of the Gr−PI film follows that of the Cu\udfoil, with the latter maintaining its surface properties and allowing in this way its reuse in subsequent chemical vapor deposition\udgrowth. The me
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