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|Abstract:||We study the effect of carbon to oxygen ratio (C/O) on the electrical resistance of functionalized graphene sheets prepared by thermal exfoliation and reduction of graphite oxide at various temperatures. Using a 2-probe technique in conjunction with Kelvin probe force microscopy, we observe a transition from high-resistance (>400 kX/sq) nonlinear current/voltage characteristics at low C/O to low-resistance (<10 kX/sq) linear behavior at high C/O, indicating a transition from hopping to diffusive electron transport. Simultaneously, the metal-graphene contacts change from high-resistance Schottky-type behavior to nearly non-invasive metal-metal contact characteristics.|
|Electronic Publication Date:||January 2013|
|Citation:||Punckt, C, Muckel, F, Wolff, S, Aksay, IA, Chavarin, CA, Bacher, G, Mertin, W. (2013). The effect of degree of reduction on the electrical properties of functionalized graphene sheets. Applied Physics Letters, 102 (10.1063/1.4775582|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||Applied Physics Letters|
|Version:||Final published version. Article is made available in OAR by the publisher's permission or policy.|
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