Research output: Contribution to journal › Article › peer-review
Raman Spectroscopy of Lattice-Matched Graphene on Strongly Interacting Metal Surfaces. / Usachov, Dmitry Yu; Davydov, Valery Yu; Levitskii, Vladimir S.; Shevelev, Viktor O.; Marchenko, Dmitry; Senkovskiy, Boris V.; Vilkov, Oleg Yu; Rybkin, Artem G.; Yashina, Lada V.; Chulkov, Evgueni V.; Sklyadneva, Irina Yu; Heid, Rolf; Bohnen, Klaus Peter; Laubschat, Clemens; Vyalikh, Denis V.
In: ACS Nano, Vol. 11, No. 6, 06.2017, p. 6336-6345.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Raman Spectroscopy of Lattice-Matched Graphene on Strongly Interacting Metal Surfaces
AU - Usachov, Dmitry Yu
AU - Davydov, Valery Yu
AU - Levitskii, Vladimir S.
AU - Shevelev, Viktor O.
AU - Marchenko, Dmitry
AU - Senkovskiy, Boris V.
AU - Vilkov, Oleg Yu
AU - Rybkin, Artem G.
AU - Yashina, Lada V.
AU - Chulkov, Evgueni V.
AU - Sklyadneva, Irina Yu
AU - Heid, Rolf
AU - Bohnen, Klaus Peter
AU - Laubschat, Clemens
AU - Vyalikh, Denis V.
PY - 2017/6
Y1 - 2017/6
N2 - Regardless of the widely accepted opinion that there is no Raman signal from single-layer graphene when it is strongly bonded to a metal surface, we present Raman spectra of a graphene monolayer on Ni(111) and Co(0001) substrates. The high binding energy of carbon to these surfaces allows formation of lattice-matched (1 X 1) structures where graphene is significantly stretched. This is reflected in a record-breaking shift of the Raman G band by more than 100 cm(-1) relative to the case of freestanding graphene. Using electron diffraction and photoemission spectroscopy, we explore the aforementioned systems together with polycrystalline graphene on Co and analyze possible intercalation of oxygen at ambient conditions. The results obtained are fully supported by Raman spectroscopy. Performing a theoretical investigation of the phonon dispersions of freestanding graphene and stretched graphene on the strongly interacting Co surface, we explain the main features of the Raman spectra. Our results create a reliable platform for application of Raman spectroscopy in diagnostics of chemisorbed graphene and related materials.
AB - Regardless of the widely accepted opinion that there is no Raman signal from single-layer graphene when it is strongly bonded to a metal surface, we present Raman spectra of a graphene monolayer on Ni(111) and Co(0001) substrates. The high binding energy of carbon to these surfaces allows formation of lattice-matched (1 X 1) structures where graphene is significantly stretched. This is reflected in a record-breaking shift of the Raman G band by more than 100 cm(-1) relative to the case of freestanding graphene. Using electron diffraction and photoemission spectroscopy, we explore the aforementioned systems together with polycrystalline graphene on Co and analyze possible intercalation of oxygen at ambient conditions. The results obtained are fully supported by Raman spectroscopy. Performing a theoretical investigation of the phonon dispersions of freestanding graphene and stretched graphene on the strongly interacting Co surface, we explain the main features of the Raman spectra. Our results create a reliable platform for application of Raman spectroscopy in diagnostics of chemisorbed graphene and related materials.
KW - electronic structure
KW - graphene
KW - intercalation
KW - metal
KW - oxygen
KW - Raman spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85021400867&partnerID=8YFLogxK
U2 - 10.1021/acsnano.7b02686
DO - 10.1021/acsnano.7b02686
M3 - статья
AN - SCOPUS:85021400867
VL - 11
SP - 6336
EP - 6345
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 6
ER -
ID: 9216698