Universität zu Köln

Usachov, Dmitry Yu., Davydov, Valery Yu., Levitskii, Vladimir S., Shevelev, Viktor O., Marchenko, Dmitry ORCID: 0000-0003-1496-4161, Senkovskiy, Boris V. ORCID: 0000-0003-1443-6780, Vilkov, Oleg Yu., Rybkin, Artem G., Yashina, Lada V., Chulkov, Evgueni V., Sklyadneva, Irina Yu., Heid, Rolf ORCID: 0000-0002-2144-1417, Bohnen, Klaus-Peter, Laubschat, Clemens and Vyalikh, Denis V. (2017). Raman Spectroscopy of Lattice-Matched Graphene on Strongly Interacting Metal Surfaces. ACS Nano, 11 (6). S. 6336 - 6346. WASHINGTON: AMER CHEMICAL SOC. ISSN 1936-086X

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Abstract

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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Usachov, Dmitry Yu. UNSPECIFIED UNSPECIFIED UNSPECIFIED Davydov, Valery Yu. UNSPECIFIED UNSPECIFIED UNSPECIFIED Levitskii, Vladimir S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Shevelev, Viktor O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Marchenko, Dmitry UNSPECIFIED orcid.org/0000-0003-1496-4161 UNSPECIFIED Senkovskiy, Boris V. UNSPECIFIED orcid.org/0000-0003-1443-6780 UNSPECIFIED Vilkov, Oleg Yu. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rybkin, Artem G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Yashina, Lada V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chulkov, Evgueni V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sklyadneva, Irina Yu. UNSPECIFIED UNSPECIFIED UNSPECIFIED Heid, Rolf UNSPECIFIED orcid.org/0000-0002-2144-1417 UNSPECIFIED Bohnen, Klaus-Peter UNSPECIFIED UNSPECIFIED UNSPECIFIED Laubschat, Clemens UNSPECIFIED UNSPECIFIED UNSPECIFIED Vyalikh, Denis V. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-229475
DOI:	10.1021/acsnano.7b02686
Journal or Publication Title:	ACS Nano
Volume:	11
Number:	6
Page Range:	S. 6336 - 6346
Date:	2017
Publisher:	AMER CHEMICAL SOC
Place of Publication:	WASHINGTON
ISSN:	1936-086X
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PHONON-DISPERSION; MONOLAYER GRAPHITE; ELECTRONIC-PROPERTIES; LINEAR-RESPONSE; NI(111); INTERFACE; PT(111); NICKEL Multiple languages Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/22947