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CO Intercalation of Graphene on Ir(111) in the Millibar Regime

Grånäs, Elin LU ; Andersen, Mie ; Arman, Mohammad A LU ; Gerber, Timm ; Hammer, Bjork ; Schnadt, Joachim LU orcid ; Andersen, Jesper N LU ; Michely, Thomas and Knudsen, Jan LU (2013) In Journal of Physical Chemistry C 117(32). p.16438-16447
Abstract
Here we show that it is possible to intercalate CO under graphene grown on Ir(111) already at room temperature when CO pressures in the millibar regime are used. From the interplay of X-ray photoelectron spectroscopy and scanning tunneling microscopy we conclude that the intercalated CO adsorption structure is similar to the (3 root 3 X 3 root 3)R30 degrees) adsorption structure that is formed on Ir(111) upon exposure to similar to 1 mbar of CO. Further, density functional theory calculations reveal that the structural and electronic properties of CO-intercalated graphene are similar to p-doped freestanding graphene. Finally we characterize nonintercalated stripes and islands that we always observe in the CO-intercalated graphene. We... (More)
Here we show that it is possible to intercalate CO under graphene grown on Ir(111) already at room temperature when CO pressures in the millibar regime are used. From the interplay of X-ray photoelectron spectroscopy and scanning tunneling microscopy we conclude that the intercalated CO adsorption structure is similar to the (3 root 3 X 3 root 3)R30 degrees) adsorption structure that is formed on Ir(111) upon exposure to similar to 1 mbar of CO. Further, density functional theory calculations reveal that the structural and electronic properties of CO-intercalated graphene are similar to p-doped freestanding graphene. Finally we characterize nonintercalated stripes and islands that we always observe in the CO-intercalated graphene. We observe these nonintercalated areas predominately in HCP and FCC areas near step edges and suggest that stress release in graphene is the driving force for their formation, while the weak chemical bonds in HCP and FCC areas are the reason for their area selectivity. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry C
volume
117
issue
32
pages
16438 - 16447
publisher
The American Chemical Society (ACS)
external identifiers
  • wos:000323301100019
  • scopus:84882342540
ISSN
1932-7447
DOI
10.1021/jp4043045
language
English
LU publication?
yes
id
0aef8d70-5ab5-4c81-886e-bd30b0a6024c (old id 4027305)
date added to LUP
2016-04-01 09:57:38
date last changed
2023-11-09 08:35:56
@article{0aef8d70-5ab5-4c81-886e-bd30b0a6024c,
  abstract     = {{Here we show that it is possible to intercalate CO under graphene grown on Ir(111) already at room temperature when CO pressures in the millibar regime are used. From the interplay of X-ray photoelectron spectroscopy and scanning tunneling microscopy we conclude that the intercalated CO adsorption structure is similar to the (3 root 3 X 3 root 3)R30 degrees) adsorption structure that is formed on Ir(111) upon exposure to similar to 1 mbar of CO. Further, density functional theory calculations reveal that the structural and electronic properties of CO-intercalated graphene are similar to p-doped freestanding graphene. Finally we characterize nonintercalated stripes and islands that we always observe in the CO-intercalated graphene. We observe these nonintercalated areas predominately in HCP and FCC areas near step edges and suggest that stress release in graphene is the driving force for their formation, while the weak chemical bonds in HCP and FCC areas are the reason for their area selectivity.}},
  author       = {{Grånäs, Elin and Andersen, Mie and Arman, Mohammad A and Gerber, Timm and Hammer, Bjork and Schnadt, Joachim and Andersen, Jesper N and Michely, Thomas and Knudsen, Jan}},
  issn         = {{1932-7447}},
  language     = {{eng}},
  number       = {{32}},
  pages        = {{16438--16447}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Journal of Physical Chemistry C}},
  title        = {{CO Intercalation of Graphene on Ir(111) in the Millibar Regime}},
  url          = {{http://dx.doi.org/10.1021/jp4043045}},
  doi          = {{10.1021/jp4043045}},
  volume       = {{117}},
  year         = {{2013}},
}