Structure and dynamics investigations of a partially hydrogenated graphene/Ni(111) surface

Emanuel Bahn; Anton Tamtögl; John Ellis; William Allison; Peter Fouquet

doi:10.1016/j.carbon.2016.12.055

Structure and dynamics investigations of a partially hydrogenated graphene/Ni(111) surface

Emanuel Bahn, Anton Tamtögl, John Ellis, William Allison, Peter Fouquet

Institute of Experimental Physics (5110)

Research output: Contribution to journal › Article › peer-review

Abstract

Using helium-3 atom scattering, we have studied the adsorption kinetics, the structure and the diffusional dynamics of atomic hydrogen on the surface of a graphene monolayer on Ni(111). Diffraction measurements reveal a 4° rotated rectangular hydrogen overstructure. Hydrogen adsorption and desorption exhibit activation barriers of Ea = ( 89 ± 7 ) meV and Ed = ( 1.8 ± 0.2 ) eV, respectively. Helium-3 spin-echo measurements showed no decay of the spatial correlation function (or intermediate scattering function) within the time range of the spectrometer. Hence, we are able to set lower limits for a possible hydrogen surface diffusion rate.

Original language	English
Pages (from-to)	504
Number of pages	510
Journal	Carbon
Volume	114
DOIs	https://doi.org/10.1016/j.carbon.2016.12.055
Publication status	Published - Dec 2016

Keywords

Graphene
Ni(111)
Hydrogenation
Helium atom scattering

Fields of Expertise

Advanced Materials Science

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10.1016/j.carbon.2016.12.055

http://www.sciencedirect.com/science/article/pii/S0008622316311332

FWF - Oberflächen - Exotic Surfaces
Tamtögl, A.
15/11/13 → 14/01/17
Project: Research project

Cite this

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title = "Structure and dynamics investigations of a partially hydrogenated graphene/Ni(111) surface",

abstract = "Using helium-3 atom scattering, we have studied the adsorption kinetics, the structure and the diffusional dynamics of atomic hydrogen on the surface of a graphene monolayer on Ni(111). Diffraction measurements reveal a 4° rotated rectangular hydrogen overstructure. Hydrogen adsorption and desorption exhibit activation barriers of Ea = ( 89 ± 7 ) meV and Ed = ( 1.8 ± 0.2 ) eV, respectively. Helium-3 spin-echo measurements showed no decay of the spatial correlation function (or intermediate scattering function) within the time range of the spectrometer. Hence, we are able to set lower limits for a possible hydrogen surface diffusion rate.",

keywords = "Graphene, Ni(111), Hydrogenation, Helium atom scattering",

author = "Emanuel Bahn and Anton Tamt{\"o}gl and John Ellis and William Allison and Peter Fouquet",

year = "2016",

month = dec,

doi = "10.1016/j.carbon.2016.12.055",

language = "English",

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journal = "Carbon",

issn = "0008-6223",

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TY - JOUR

T1 - Structure and dynamics investigations of a partially hydrogenated graphene/Ni(111) surface

AU - Bahn, Emanuel

AU - Tamtögl, Anton

AU - Ellis, John

AU - Allison, William

AU - Fouquet, Peter

PY - 2016/12

Y1 - 2016/12

N2 - Using helium-3 atom scattering, we have studied the adsorption kinetics, the structure and the diffusional dynamics of atomic hydrogen on the surface of a graphene monolayer on Ni(111). Diffraction measurements reveal a 4° rotated rectangular hydrogen overstructure. Hydrogen adsorption and desorption exhibit activation barriers of Ea = ( 89 ± 7 ) meV and Ed = ( 1.8 ± 0.2 ) eV, respectively. Helium-3 spin-echo measurements showed no decay of the spatial correlation function (or intermediate scattering function) within the time range of the spectrometer. Hence, we are able to set lower limits for a possible hydrogen surface diffusion rate.

AB - Using helium-3 atom scattering, we have studied the adsorption kinetics, the structure and the diffusional dynamics of atomic hydrogen on the surface of a graphene monolayer on Ni(111). Diffraction measurements reveal a 4° rotated rectangular hydrogen overstructure. Hydrogen adsorption and desorption exhibit activation barriers of Ea = ( 89 ± 7 ) meV and Ed = ( 1.8 ± 0.2 ) eV, respectively. Helium-3 spin-echo measurements showed no decay of the spatial correlation function (or intermediate scattering function) within the time range of the spectrometer. Hence, we are able to set lower limits for a possible hydrogen surface diffusion rate.

KW - Graphene

KW - Ni(111)

KW - Hydrogenation

KW - Helium atom scattering

U2 - 10.1016/j.carbon.2016.12.055

DO - 10.1016/j.carbon.2016.12.055

M3 - Article

SN - 0008-6223

VL - 114

SP - 504

JO - Carbon

JF - Carbon

ER -

Structure and dynamics investigations of a partially hydrogenated graphene/Ni(111) surface

Abstract

Keywords

Fields of Expertise

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Projects

FWF - Oberflächen - Exotic Surfaces

Cite this