Electronic properties of hydrogenated quasi-free-standing graphene

Danny Haberer; Luca Petaccia; Ying Wang; H Quian; Mani Farjam; S. A. Jafari; Hermann Sachdev; Alexander V. Fedorov; Dmitry Usachov; D.V. Vyalikh; Xianjie Liu; Oleg Vilkov; Vera K. Adamchuk; Stephan Irle; Martin Knupfer; Bernd Büchner; Alexander Grüneis

doi:10.1002/pssb.201100521

Electronic properties of hydrogenated quasi-free-standing graphene

Danny Haberer (Corresponding author), Luca Petaccia, Ying Wang, H Quian, Mani Farjam, S. A. Jafari, Hermann Sachdev, Alexander V. Fedorov, Dmitry Usachov, D.V. Vyalikh, Xianjie Liu, Oleg Vilkov, Vera K. Adamchuk, Stephan Irle, Martin Knupfer, Bernd Büchner, Alexander Grüneis

Electronic Properties of Materials

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Abstract

ailoring the electronic properties of graphene is of fundamental interest regarding its application in electronic devices. One of the key strategies is chemical functionalization which modifies the pi-electron system and thus can induce band gaps. However, in order to control the degree of functionalization it is crucial to know the exact amount of the chemisorbed species. We show with angle-resolved photoemission spectroscopy (ARPES) the formation of a band gap in graphene and estimate the hydrogen coverage from the scattering rate. Using X-ray photoemission spectroscopy (XPS) we identify the chemical environments in hydrogenated graphene and determine the total hydrogen to carbon (H/C)-ratio directly from the spectra. We then compare ARPES and XPS as tools for determining the H/C-ratio and discuss the results from molecular dynamics (MD) simulations.

Original language	English
Pages (from-to)	2639-2643
Number of pages	5
Journal	Physica Status Solidi. B: Basic Research
Volume	248
Issue number	11
DOIs	https://doi.org/10.1002/pssb.201100521
Publication status	Published - 2011

Austrian Fields of Science 2012

103015 Condensed matter

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10.1002/pssb.201100521

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Haberer, D., Petaccia, L., Wang, Y., Quian, H., Farjam, M., Jafari, S. A., Sachdev, H., Fedorov, A. V., Usachov, D., Vyalikh, D. V., Liu, X., Vilkov, O., Adamchuk, V. K., Irle, S., Knupfer, M., Büchner, B., & Grüneis, A. (2011). Electronic properties of hydrogenated quasi-free-standing graphene. Physica Status Solidi. B: Basic Research, 248(11), 2639-2643. https://doi.org/10.1002/pssb.201100521

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abstract = "ailoring the electronic properties of graphene is of fundamental interest regarding its application in electronic devices. One of the key strategies is chemical functionalization which modifies the pi-electron system and thus can induce band gaps. However, in order to control the degree of functionalization it is crucial to know the exact amount of the chemisorbed species. We show with angle-resolved photoemission spectroscopy (ARPES) the formation of a band gap in graphene and estimate the hydrogen coverage from the scattering rate. Using X-ray photoemission spectroscopy (XPS) we identify the chemical environments in hydrogenated graphene and determine the total hydrogen to carbon (H/C)-ratio directly from the spectra. We then compare ARPES and XPS as tools for determining the H/C-ratio and discuss the results from molecular dynamics (MD) simulations.",

author = "Danny Haberer and Luca Petaccia and Ying Wang and H Quian and Mani Farjam and Jafari, {S. A.} and Hermann Sachdev and Fedorov, {Alexander V.} and Dmitry Usachov and D.V. Vyalikh and Xianjie Liu and Oleg Vilkov and Adamchuk, {Vera K.} and Stephan Irle and Martin Knupfer and Bernd B{\"u}chner and Alexander Gr{\"u}neis",

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Haberer, D, Petaccia, L, Wang, Y, Quian, H, Farjam, M, Jafari, SA, Sachdev, H, Fedorov, AV, Usachov, D, Vyalikh, DV, Liu, X, Vilkov, O, Adamchuk, VK, Irle, S, Knupfer, M, Büchner, B & Grüneis, A 2011, 'Electronic properties of hydrogenated quasi-free-standing graphene', Physica Status Solidi. B: Basic Research, vol. 248, no. 11, pp. 2639-2643. https://doi.org/10.1002/pssb.201100521

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T1 - Electronic properties of hydrogenated quasi-free-standing graphene

AU - Haberer, Danny

AU - Petaccia, Luca

AU - Wang, Ying

AU - Quian, H

AU - Farjam, Mani

AU - Jafari, S. A.

AU - Sachdev, Hermann

AU - Fedorov, Alexander V.

AU - Usachov, Dmitry

AU - Vyalikh, D.V.

AU - Liu, Xianjie

AU - Vilkov, Oleg

AU - Adamchuk, Vera K.

AU - Irle, Stephan

AU - Knupfer, Martin

AU - Büchner, Bernd

AU - Grüneis, Alexander

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PY - 2011

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N2 - ailoring the electronic properties of graphene is of fundamental interest regarding its application in electronic devices. One of the key strategies is chemical functionalization which modifies the pi-electron system and thus can induce band gaps. However, in order to control the degree of functionalization it is crucial to know the exact amount of the chemisorbed species. We show with angle-resolved photoemission spectroscopy (ARPES) the formation of a band gap in graphene and estimate the hydrogen coverage from the scattering rate. Using X-ray photoemission spectroscopy (XPS) we identify the chemical environments in hydrogenated graphene and determine the total hydrogen to carbon (H/C)-ratio directly from the spectra. We then compare ARPES and XPS as tools for determining the H/C-ratio and discuss the results from molecular dynamics (MD) simulations.

AB - ailoring the electronic properties of graphene is of fundamental interest regarding its application in electronic devices. One of the key strategies is chemical functionalization which modifies the pi-electron system and thus can induce band gaps. However, in order to control the degree of functionalization it is crucial to know the exact amount of the chemisorbed species. We show with angle-resolved photoemission spectroscopy (ARPES) the formation of a band gap in graphene and estimate the hydrogen coverage from the scattering rate. Using X-ray photoemission spectroscopy (XPS) we identify the chemical environments in hydrogenated graphene and determine the total hydrogen to carbon (H/C)-ratio directly from the spectra. We then compare ARPES and XPS as tools for determining the H/C-ratio and discuss the results from molecular dynamics (MD) simulations.

U2 - 10.1002/pssb.201100521

DO - 10.1002/pssb.201100521

M3 - Article

SN - 0370-1972

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SP - 2639

EP - 2643

JO - Physica Status Solidi. B: Basic Research

JF - Physica Status Solidi. B: Basic Research

IS - 11

ER -

Electronic properties of hydrogenated quasi-free-standing graphene

Abstract

Austrian Fields of Science 2012

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