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      The narrowest possible graphene nanoribbon was synthesized fifty years ago

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          Abstract

          A survey of the organic chemistry literature for the past 50 years shows that graphene nanoribbon type molecules of only one benzene ring width, both with armchair (sexiphenyl) and zig-zag (hexacene) edges have been produced. The variation of the band gap of these molecules with the number of constituent aromatic rings is consistent with the behavior of graphene nanoribbons of corresponding orientations.

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          Most cited references 17

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          High-yield production of graphene by liquid-phase exfoliation of graphite.

          Fully exploiting the properties of graphene will require a method for the mass production of this remarkable material. Two main routes are possible: large-scale growth or large-scale exfoliation. Here, we demonstrate graphene dispersions with concentrations up to approximately 0.01 mg ml(-1), produced by dispersion and exfoliation of graphite in organic solvents such as N-methyl-pyrrolidone. This is possible because the energy required to exfoliate graphene is balanced by the solvent-graphene interaction for solvents whose surface energies match that of graphene. We confirm the presence of individual graphene sheets by Raman spectroscopy, transmission electron microscopy and electron diffraction. Our method results in a monolayer yield of approximately 1 wt%, which could potentially be improved to 7-12 wt% with further processing. The absence of defects or oxides is confirmed by X-ray photoelectron, infrared and Raman spectroscopies. We are able to produce semi-transparent conducting films and conducting composites. Solution processing of graphene opens up a range of potential large-area applications, from device and sensor fabrication to liquid-phase chemistry.
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            Synthetic Principles for Bandgap Control in Linear pi-Conjugated Systems.

             Jean Roncali (1997)
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              Controlled nanocutting of graphene

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                Author and article information

                Journal
                566
                120120
                Nanopages
                Akadémiai Kiadó
                1787-4033
                1788-0718
                1 June 2012
                26 October 2010
                : 7
                : 1 ( otherID: X5XML79X0730 )
                : 25-27
                Affiliations
                [ 1 ] Research Institute for Technical Physics and Materials Science H-1525 Budapest POB 49 Hungary
                [ 2 ] Facultés Universitaires Notre-Dame de la Paix B-5000 Namur Rue de Bruxelles 61 Belgium
                Article
                1267788W4534P642
                10.1556/Nano.2010.00004

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