Research output: Contribution to journal › Article › peer-review
Nitrogen-doped graphene on a curved nickel surface. / Vilkov, Oleg Yu; Tarasov, Artem V.; Bokai, Kirill A.; Makarova, Anna A.; Muntwiler, Matthias; Schiller, Frederik; Ortega, J. Enrique; Yashina, Lada V.; Vyalikh, Denis V.; Usachov, Dmitry Yu.
In: Carbon, Vol. 183, 15.10.2021, p. 711-720.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Nitrogen-doped graphene on a curved nickel surface
AU - Vilkov, Oleg Yu
AU - Tarasov, Artem V.
AU - Bokai, Kirill A.
AU - Makarova, Anna A.
AU - Muntwiler, Matthias
AU - Schiller, Frederik
AU - Ortega, J. Enrique
AU - Yashina, Lada V.
AU - Vyalikh, Denis V.
AU - Usachov, Dmitry Yu
N1 - Publisher Copyright: © 2021
PY - 2021/10/15
Y1 - 2021/10/15
N2 - Graphene growth and doping are well studied on flat surfaces of various materials. To further advance the technological implementation of graphene-based systems, fundamental studies need more appropriate model templates, whose surfaces would mimic substrates with non-trivial topography. Here, using electron and photoelectron diffraction and photoemission spectroscopy as well, we demonstrate how a curved tungsten crystal covered by a thin nickel film can properly be used as such platform, allowing the fabrication and comprehensive characterization of nitrogen-doped graphene. We show the way in which nitrogen impurities prefer to embed into the graphene matrix at different areas of the curved metallic surface with variable density of atomic steps. In particular, at atomically flat regions with a strong graphene-metal interaction, pyridinic configuration is the most abundant form of dopants, while graphitic nitrogen strongly dominates in places with a weak coupling of graphene to the substrate, i.e., in the vicinity of the surface irregularities. We recognize single crystals with curvilinear surfaces as versatile platforms for the studies of not only low-dimensional materials, but also molecular adsorption, chemical reactions and catalysis on surfaces with complex structure.
AB - Graphene growth and doping are well studied on flat surfaces of various materials. To further advance the technological implementation of graphene-based systems, fundamental studies need more appropriate model templates, whose surfaces would mimic substrates with non-trivial topography. Here, using electron and photoelectron diffraction and photoemission spectroscopy as well, we demonstrate how a curved tungsten crystal covered by a thin nickel film can properly be used as such platform, allowing the fabrication and comprehensive characterization of nitrogen-doped graphene. We show the way in which nitrogen impurities prefer to embed into the graphene matrix at different areas of the curved metallic surface with variable density of atomic steps. In particular, at atomically flat regions with a strong graphene-metal interaction, pyridinic configuration is the most abundant form of dopants, while graphitic nitrogen strongly dominates in places with a weak coupling of graphene to the substrate, i.e., in the vicinity of the surface irregularities. We recognize single crystals with curvilinear surfaces as versatile platforms for the studies of not only low-dimensional materials, but also molecular adsorption, chemical reactions and catalysis on surfaces with complex structure.
KW - Curved crystals
KW - Graphitic nitrogen
KW - N-Graphene
KW - Non-trivial substrate topography
KW - Vicinal surfaces
KW - TRANSPORT-PROPERTIES
KW - GROWTH
KW - LEED
KW - ATOMIC-SCALE
KW - STEPS
UR - http://www.scopus.com/inward/record.url?scp=85111247560&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2021.07.038
DO - 10.1016/j.carbon.2021.07.038
M3 - Article
AN - SCOPUS:85111247560
VL - 183
SP - 711
EP - 720
JO - Carbon
JF - Carbon
SN - 0008-6223
ER -
ID: 85234629