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Oxygen Switching of the Epitaxial Graphene-Metal Interaction

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Oxygen Switching of the Epitaxial Graphene-Metal Interaction. / Larciprete, Rosanna; Ulstrup, Søren; Lacovig, Paolo; Dalmiglio, Matteo; Bianchi, Marco; Mazzola, Frederico; Hornekær, Liv; Orlando, Fabrizio; Baraldi, Alessandro; Hofmann, Philip; Lizzit, Silvano.

In: A C S Nano, Vol. 6, No. 11, 2012, p. 9551–9558.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

Larciprete, R, Ulstrup, S, Lacovig, P, Dalmiglio, M, Bianchi, M, Mazzola, F, Hornekær, L, Orlando, F, Baraldi, A, Hofmann, P & Lizzit, S 2012, 'Oxygen Switching of the Epitaxial Graphene-Metal Interaction', A C S Nano, vol. 6, no. 11, pp. 9551–9558. https://doi.org/10.1021/nn302729j

APA

Larciprete, R., Ulstrup, S., Lacovig, P., Dalmiglio, M., Bianchi, M., Mazzola, F., Hornekær, L., Orlando, F., Baraldi, A., Hofmann, P., & Lizzit, S. (2012). Oxygen Switching of the Epitaxial Graphene-Metal Interaction. A C S Nano, 6(11), 9551–9558. https://doi.org/10.1021/nn302729j

CBE

Larciprete R, Ulstrup S, Lacovig P, Dalmiglio M, Bianchi M, Mazzola F, Hornekær L, Orlando F, Baraldi A, Hofmann P, Lizzit S. 2012. Oxygen Switching of the Epitaxial Graphene-Metal Interaction. A C S Nano. 6(11):9551–9558. https://doi.org/10.1021/nn302729j

MLA

Larciprete, Rosanna et al. "Oxygen Switching of the Epitaxial Graphene-Metal Interaction". A C S Nano. 2012, 6(11). 9551–9558. https://doi.org/10.1021/nn302729j

Vancouver

Larciprete R, Ulstrup S, Lacovig P, Dalmiglio M, Bianchi M, Mazzola F et al. Oxygen Switching of the Epitaxial Graphene-Metal Interaction. A C S Nano. 2012;6(11):9551–9558. https://doi.org/10.1021/nn302729j

Author

Larciprete, Rosanna ; Ulstrup, Søren ; Lacovig, Paolo ; Dalmiglio, Matteo ; Bianchi, Marco ; Mazzola, Frederico ; Hornekær, Liv ; Orlando, Fabrizio ; Baraldi, Alessandro ; Hofmann, Philip ; Lizzit, Silvano. / Oxygen Switching of the Epitaxial Graphene-Metal Interaction. In: A C S Nano. 2012 ; Vol. 6, No. 11. pp. 9551–9558.

Bibtex

@article{943d98f098294771925cb8e52b67478c,
title = "Oxygen Switching of the Epitaxial Graphene-Metal Interaction",
abstract = "Using photoemission spectroscopy techniques, weshow that oxygen intercalation is achieved on an extended layer ofepitaxial graphene on Ir(111), which results in the “lifting” of thegraphene layer and in its decoupling from the metal substrate. Theoxygen adsorption below graphene proceeds as on clean Ir(111),giving only a slightly higher oxygen coverage. Upon lifting, the C 1ssignal shows a downshift in binding energy, due to the chargetransfer to graphene from the oxygen-covered metal surface.Moreover, the characteristic spectral signatures of the graphenesubstrate interaction in the valence band are removed, and the spectrum of stronglyhole-doped, quasi free-standing graphene with a single Dirac cone around the K point is observed. The oxygen can be deintercalated by annealing, and thisprocess takes place at around T = 600 K, in a rather abrupt way. A small amount of carbon atoms is lost, implying that graphene has been etched. Afterdeintercalation graphene restores its interaction with the Ir(111) substrate. Additional intercalation/deintercalation cycles readily occur at lower oxygendoses and temperatures, consistently with an increasingly defective lattice. Our findings demonstrate that oxygen intercalation is an efficient method forfully decoupling an extended layer of graphene from a metal substrate, such as Ir(111). They pave the way for the fundamental research on graphene,where extended, ordered layers of free-standing graphene are important and, due to the stability of the intercalated system in a wide temperature range,also for the advancement of next-generation graphene-based electronics.KEYWORDS: epitaxial graphene . Ir(111) . oxygen intercalation . doping",
author = "Rosanna Larciprete and S{\o}ren Ulstrup and Paolo Lacovig and Matteo Dalmiglio and Marco Bianchi and Frederico Mazzola and Liv Hornek{\ae}r and Fabrizio Orlando and Alessandro Baraldi and Philip Hofmann and Silvano Lizzit",
year = "2012",
doi = "10.1021/nn302729j",
language = "English",
volume = "6",
pages = "9551–9558",
journal = "A C S Nano",
issn = "1936-0851",
publisher = "American Chemical Society",
number = "11",

}

RIS

TY - JOUR

T1 - Oxygen Switching of the Epitaxial Graphene-Metal Interaction

AU - Larciprete, Rosanna

AU - Ulstrup, Søren

AU - Lacovig, Paolo

AU - Dalmiglio, Matteo

AU - Bianchi, Marco

AU - Mazzola, Frederico

AU - Hornekær, Liv

AU - Orlando, Fabrizio

AU - Baraldi, Alessandro

AU - Hofmann, Philip

AU - Lizzit, Silvano

PY - 2012

Y1 - 2012

N2 - Using photoemission spectroscopy techniques, weshow that oxygen intercalation is achieved on an extended layer ofepitaxial graphene on Ir(111), which results in the “lifting” of thegraphene layer and in its decoupling from the metal substrate. Theoxygen adsorption below graphene proceeds as on clean Ir(111),giving only a slightly higher oxygen coverage. Upon lifting, the C 1ssignal shows a downshift in binding energy, due to the chargetransfer to graphene from the oxygen-covered metal surface.Moreover, the characteristic spectral signatures of the graphenesubstrate interaction in the valence band are removed, and the spectrum of stronglyhole-doped, quasi free-standing graphene with a single Dirac cone around the K point is observed. The oxygen can be deintercalated by annealing, and thisprocess takes place at around T = 600 K, in a rather abrupt way. A small amount of carbon atoms is lost, implying that graphene has been etched. Afterdeintercalation graphene restores its interaction with the Ir(111) substrate. Additional intercalation/deintercalation cycles readily occur at lower oxygendoses and temperatures, consistently with an increasingly defective lattice. Our findings demonstrate that oxygen intercalation is an efficient method forfully decoupling an extended layer of graphene from a metal substrate, such as Ir(111). They pave the way for the fundamental research on graphene,where extended, ordered layers of free-standing graphene are important and, due to the stability of the intercalated system in a wide temperature range,also for the advancement of next-generation graphene-based electronics.KEYWORDS: epitaxial graphene . Ir(111) . oxygen intercalation . doping

AB - Using photoemission spectroscopy techniques, weshow that oxygen intercalation is achieved on an extended layer ofepitaxial graphene on Ir(111), which results in the “lifting” of thegraphene layer and in its decoupling from the metal substrate. Theoxygen adsorption below graphene proceeds as on clean Ir(111),giving only a slightly higher oxygen coverage. Upon lifting, the C 1ssignal shows a downshift in binding energy, due to the chargetransfer to graphene from the oxygen-covered metal surface.Moreover, the characteristic spectral signatures of the graphenesubstrate interaction in the valence band are removed, and the spectrum of stronglyhole-doped, quasi free-standing graphene with a single Dirac cone around the K point is observed. The oxygen can be deintercalated by annealing, and thisprocess takes place at around T = 600 K, in a rather abrupt way. A small amount of carbon atoms is lost, implying that graphene has been etched. Afterdeintercalation graphene restores its interaction with the Ir(111) substrate. Additional intercalation/deintercalation cycles readily occur at lower oxygendoses and temperatures, consistently with an increasingly defective lattice. Our findings demonstrate that oxygen intercalation is an efficient method forfully decoupling an extended layer of graphene from a metal substrate, such as Ir(111). They pave the way for the fundamental research on graphene,where extended, ordered layers of free-standing graphene are important and, due to the stability of the intercalated system in a wide temperature range,also for the advancement of next-generation graphene-based electronics.KEYWORDS: epitaxial graphene . Ir(111) . oxygen intercalation . doping

U2 - 10.1021/nn302729j

DO - 10.1021/nn302729j

M3 - Journal article

C2 - 23051045

VL - 6

SP - 9551

EP - 9558

JO - A C S Nano

JF - A C S Nano

SN - 1936-0851

IS - 11

ER -