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Influence of Graphene on Charge Transfer between CoPc and Metals: The Role of Graphene-Substrate Coupling

Uihlein, Johannes; Polek, Malgorzata; Glaser, Mathias; Adler, Hilmar; Ovsyannikov, Ruslan; Bauer, Maximilian; Ivanovic, Milutin; Preobrajenski, Alexei LU ; Generalov, Alexander LU and Chasse, Thomas, et al. (2015) In Journal of Physical Chemistry C 119(27). p.15240-15247
Abstract
The electronic structure of cobalt phthalocyanine (CoPc) on Pt(111), graphene/Pt(111), and Au-intercalated graphene/Ni(111) is investigated by photoexcited electron spectroscopies: photoemission (XPS and UPS) and X-ray absorption spectroscopy (XAS or NEXAFS). For CoPc on Pt(111), significant changes of the shape of XPS and XAS spectra indicate a charge transfer from the metal substrate to the Co ion of CoPc. The strong interaction between CoPc and Pt(111) can be completely prevented by the insertion of a graphene buffer layer. For CoPc on graphene/Ni(111), the charge transfer is only prevented if the graphene on Ni(111) is intercalated by gold. Therefore, the disturbance of the graphene electronic structure by the interaction with... (More)
The electronic structure of cobalt phthalocyanine (CoPc) on Pt(111), graphene/Pt(111), and Au-intercalated graphene/Ni(111) is investigated by photoexcited electron spectroscopies: photoemission (XPS and UPS) and X-ray absorption spectroscopy (XAS or NEXAFS). For CoPc on Pt(111), significant changes of the shape of XPS and XAS spectra indicate a charge transfer from the metal substrate to the Co ion of CoPc. The strong interaction between CoPc and Pt(111) can be completely prevented by the insertion of a graphene buffer layer. For CoPc on graphene/Ni(111), the charge transfer is only prevented if the graphene on Ni(111) is intercalated by gold. Therefore, the disturbance of the graphene electronic structure by the interaction with underlying substrate and the corresponding charge doping of graphene has been found to affect the electronic properties of adsorbed CoPc considerably. (Less)
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type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry C
volume
119
issue
27
pages
15240 - 15247
publisher
The American Chemical Society
external identifiers
  • wos:000357964900047
  • scopus:84936855937
ISSN
1932-7447
DOI
10.1021/acs.jpcc.5b02912
language
English
LU publication?
yes
id
8399d452-7dfd-4207-94ed-473c912a1141 (old id 7783653)
date added to LUP
2015-09-18 15:49:13
date last changed
2017-09-17 03:01:35
@article{8399d452-7dfd-4207-94ed-473c912a1141,
  abstract     = {The electronic structure of cobalt phthalocyanine (CoPc) on Pt(111), graphene/Pt(111), and Au-intercalated graphene/Ni(111) is investigated by photoexcited electron spectroscopies: photoemission (XPS and UPS) and X-ray absorption spectroscopy (XAS or NEXAFS). For CoPc on Pt(111), significant changes of the shape of XPS and XAS spectra indicate a charge transfer from the metal substrate to the Co ion of CoPc. The strong interaction between CoPc and Pt(111) can be completely prevented by the insertion of a graphene buffer layer. For CoPc on graphene/Ni(111), the charge transfer is only prevented if the graphene on Ni(111) is intercalated by gold. Therefore, the disturbance of the graphene electronic structure by the interaction with underlying substrate and the corresponding charge doping of graphene has been found to affect the electronic properties of adsorbed CoPc considerably.},
  author       = {Uihlein, Johannes and Polek, Malgorzata and Glaser, Mathias and Adler, Hilmar and Ovsyannikov, Ruslan and Bauer, Maximilian and Ivanovic, Milutin and Preobrajenski, Alexei and Generalov, Alexander and Chasse, Thomas and Peisert, Heiko},
  issn         = {1932-7447},
  language     = {eng},
  number       = {27},
  pages        = {15240--15247},
  publisher    = {The American Chemical Society},
  series       = {Journal of Physical Chemistry C},
  title        = {Influence of Graphene on Charge Transfer between CoPc and Metals: The Role of Graphene-Substrate Coupling},
  url          = {http://dx.doi.org/10.1021/acs.jpcc.5b02912},
  volume       = {119},
  year         = {2015},
}