Direct Graphene Growth on Metal Oxides by Molecular Epitaxy

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Patent relating to the controlled, layer-by-layer growth of graphene on a useful, magnetizable/and or insulating substrate using molecular beam epitaxy (MBE).

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16 p. : ill.

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Kelber, Jeffry A. April 18, 2017.

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This patent is part of the collection entitled: UNT Scholarly Works and was provided by UNT College of Arts and Sciences to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 39 times , with 4 in the last month . More information about this patent can be viewed below.

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Description

Patent relating to the controlled, layer-by-layer growth of graphene on a useful, magnetizable/and or insulating substrate using molecular beam epitaxy (MBE).

Physical Description

16 p. : ill.

Notes

Abstract: Direct growth of graphene on Co3O4(111) at 1000 K was achieved by molecular beam epitaxy from a graphite source. Auger spectroscopy shows a characteristic sp2 carbon lineshape, at average carbon coverages from 0.4-3 monolayers. Low energy electron diffraction (LEED) indicates (111) ordering of the sp2 carbon film with a lattice constant of 2.5 (±0.1) Å characteristic of graphene. Six-fold symmetry of the graphene diffraction spots is observed at 0.4, 1 and 3 monolayers. The LEED data also indicate an average domain size of ˜1800 Å, and show an incommensurate interface with the Co3O4(111) substrate, where the latter exhibits a lattice constant of 2.8 (±0.1) Å. Core level photoemission shows a characteristically asymmetric C(1s) feature, with the expected lr to lr* satellite feature, but with a binding energy for the three monolayer film of 284.9 (±0.1) eV, indicative of substantial graphene-to-oxide charge transfer.

Prior Publication Data: US 2014/0332915 A1, Nov. 13, 2014

Related U.S. Application Data: Provisional application No. 61/567,344 filed on Dec. 6, 2011.

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  • June 13, 2013

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  • April 18, 2017

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  • April 18, 2017

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  • Aug. 29, 2017, 9:38 a.m.

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Kelber, Jeffry A. Direct Graphene Growth on Metal Oxides by Molecular Epitaxy, patent, April 18, 2017; Washington, D.C.. (digital.library.unt.edu/ark:/67531/metadc990948/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Arts and Sciences.