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Richard Balog

Symmetry-Driven Band Gap Engineering in Hydrogen Functionalized Graphene

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Symmetry-Driven Band Gap Engineering in Hydrogen Functionalized Graphene. / Jørgensen, Jakob Holm; Grubisic Cabo, Antonija; Balog, Richard; Hansen, Line Kyhl; Groves, Michael N.; Cassidy, Andrew Martin; Bruix, Albert; Bianchi, Marco; Dendzik, Maciej; Arman, Mohammad Alif; Lammich, Lutz; Pascual, José Ignacio; Knudsen, Jan; Hammer, Bjørk; Hofmann, Philip; Hornekaer, Liv.

In: A C S Nano, Vol. 10, No. 12, 2016, p. 10798-10807.

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

Harvard

Jørgensen, JH, Grubisic Cabo, A, Balog, R, Hansen, LK, Groves, MN, Cassidy, AM, Bruix, A, Bianchi, M, Dendzik, M, Arman, MA, Lammich, L, Pascual, JI, Knudsen, J, Hammer, B, Hofmann, P & Hornekaer, L 2016, 'Symmetry-Driven Band Gap Engineering in Hydrogen Functionalized Graphene', A C S Nano, vol. 10, no. 12, pp. 10798-10807. https://doi.org/10.1021/acsnano.6b04671

APA

CBE

Jørgensen JH, Grubisic Cabo A, Balog R, Hansen LK, Groves MN, Cassidy AM, Bruix A, Bianchi M, Dendzik M, Arman MA, Lammich L, Pascual JI, Knudsen J, Hammer B, Hofmann P, Hornekaer L. 2016. Symmetry-Driven Band Gap Engineering in Hydrogen Functionalized Graphene. A C S Nano. 10(12):10798-10807. https://doi.org/10.1021/acsnano.6b04671

MLA

Vancouver

Author

Jørgensen, Jakob Holm ; Grubisic Cabo, Antonija ; Balog, Richard ; Hansen, Line Kyhl ; Groves, Michael N. ; Cassidy, Andrew Martin ; Bruix, Albert ; Bianchi, Marco ; Dendzik, Maciej ; Arman, Mohammad Alif ; Lammich, Lutz ; Pascual, José Ignacio ; Knudsen, Jan ; Hammer, Bjørk ; Hofmann, Philip ; Hornekaer, Liv. / Symmetry-Driven Band Gap Engineering in Hydrogen Functionalized Graphene. In: A C S Nano. 2016 ; Vol. 10, No. 12. pp. 10798-10807.

Bibtex

@article{a131fd2b124e4d21806590c7956c4587,
title = "Symmetry-Driven Band Gap Engineering in Hydrogen Functionalized Graphene",
abstract = "Band gap engineering in hydrogen functionalized graphene is demonstrated by changing the symmetry of the functionalization structures. Small differences in hydrogen adsorbate binding energies on graphene on Ir(111) allow tailoring of highly periodic functionalization structures favoring one distinct region of the moir{\'e} supercell. Scanning tunneling microscopy and X-ray photoelectron spectroscopy measurements show that a highly periodic hydrogen functionalized graphene sheet can thus be prepared by controlling the sample temperature (Ts) during hydrogen functionalization. At deposition temperatures of Ts = 645 K and above, hydrogen adsorbs exclusively on the HCP regions of the graphene/Ir(111) moir{\'e} structure. This finding is rationalized in terms of a slight preference for hydrogen clusters in the HCP regions over the FCC regions, as found by density functional theory calculations. Angle-resolved photoemission spectroscopy measurements demonstrate that the preferential functionalization of just one region of the moir{\'e} supercell results in a band gap opening with very limited associated band broadening. Thus, hydrogenation at elevated sample temperatures provides a pathway to efficient band gap engineering in graphene via the selective functionalization of specific regions of the moir{\'e} structure.",
author = "J{\o}rgensen, {Jakob Holm} and {Grubisic Cabo}, Antonija and Richard Balog and Hansen, {Line Kyhl} and Groves, {Michael N.} and Cassidy, {Andrew Martin} and Albert Bruix and Marco Bianchi and Maciej Dendzik and Arman, {Mohammad Alif} and Lutz Lammich and Pascual, {Jos{\'e} Ignacio} and Jan Knudsen and Bj{\o}rk Hammer and Philip Hofmann and Liv Hornekaer",
year = "2016",
doi = "10.1021/acsnano.6b04671",
language = "English",
volume = "10",
pages = "10798--10807",
journal = "A C S Nano",
issn = "1936-0851",
publisher = "American Chemical Society",
number = "12",

}

RIS

TY - JOUR

T1 - Symmetry-Driven Band Gap Engineering in Hydrogen Functionalized Graphene

AU - Jørgensen, Jakob Holm

AU - Grubisic Cabo, Antonija

AU - Balog, Richard

AU - Hansen, Line Kyhl

AU - Groves, Michael N.

AU - Cassidy, Andrew Martin

AU - Bruix, Albert

AU - Bianchi, Marco

AU - Dendzik, Maciej

AU - Arman, Mohammad Alif

AU - Lammich, Lutz

AU - Pascual, José Ignacio

AU - Knudsen, Jan

AU - Hammer, Bjørk

AU - Hofmann, Philip

AU - Hornekaer, Liv

PY - 2016

Y1 - 2016

N2 - Band gap engineering in hydrogen functionalized graphene is demonstrated by changing the symmetry of the functionalization structures. Small differences in hydrogen adsorbate binding energies on graphene on Ir(111) allow tailoring of highly periodic functionalization structures favoring one distinct region of the moiré supercell. Scanning tunneling microscopy and X-ray photoelectron spectroscopy measurements show that a highly periodic hydrogen functionalized graphene sheet can thus be prepared by controlling the sample temperature (Ts) during hydrogen functionalization. At deposition temperatures of Ts = 645 K and above, hydrogen adsorbs exclusively on the HCP regions of the graphene/Ir(111) moiré structure. This finding is rationalized in terms of a slight preference for hydrogen clusters in the HCP regions over the FCC regions, as found by density functional theory calculations. Angle-resolved photoemission spectroscopy measurements demonstrate that the preferential functionalization of just one region of the moiré supercell results in a band gap opening with very limited associated band broadening. Thus, hydrogenation at elevated sample temperatures provides a pathway to efficient band gap engineering in graphene via the selective functionalization of specific regions of the moiré structure.

AB - Band gap engineering in hydrogen functionalized graphene is demonstrated by changing the symmetry of the functionalization structures. Small differences in hydrogen adsorbate binding energies on graphene on Ir(111) allow tailoring of highly periodic functionalization structures favoring one distinct region of the moiré supercell. Scanning tunneling microscopy and X-ray photoelectron spectroscopy measurements show that a highly periodic hydrogen functionalized graphene sheet can thus be prepared by controlling the sample temperature (Ts) during hydrogen functionalization. At deposition temperatures of Ts = 645 K and above, hydrogen adsorbs exclusively on the HCP regions of the graphene/Ir(111) moiré structure. This finding is rationalized in terms of a slight preference for hydrogen clusters in the HCP regions over the FCC regions, as found by density functional theory calculations. Angle-resolved photoemission spectroscopy measurements demonstrate that the preferential functionalization of just one region of the moiré supercell results in a band gap opening with very limited associated band broadening. Thus, hydrogenation at elevated sample temperatures provides a pathway to efficient band gap engineering in graphene via the selective functionalization of specific regions of the moiré structure.

U2 - 10.1021/acsnano.6b04671

DO - 10.1021/acsnano.6b04671

M3 - Journal article

C2 - 28024374

VL - 10

SP - 10798

EP - 10807

JO - A C S Nano

JF - A C S Nano

SN - 1936-0851

IS - 12

ER -