Header

UZH-Logo

Maintenance Infos

Graphene on Ru(0001): A 25×25 Supercell


Martoccia, D; Willmott, P R; Brugger, T; Björck, M; Günther, S; Schlepütz, C M; Cervellino, A; Pauli, S A; Patterson, B D; Marchini, S; Wintterlin, J; Moritz, W; Greber, T (2008). Graphene on Ru(0001): A 25×25 Supercell. Physical Review Letters, 101(12):126102.

Abstract

The structure of a single layer of graphene on Ru(0001) has been studied using surface x-ray diffraction. A surprising superstructure containing 1250 carbon atoms has been determined, whereby 25×25 graphene unit cells lie on 23×23 unit cells of Ru. Each supercell contains 2×2 crystallographically inequivalent subcells caused by corrugation. Strong intensity oscillations in the superstructure rods demonstrate that the Ru substrate is also significantly corrugated down to several monolayers and that the bonding between graphene and Ru is strong and cannot be caused by van der Waals bonds. Charge transfer from the Ru substrate to the graphene expands and weakens the C–C bonds, which helps accommodate the in-plane tensile stress. The elucidation of this superstructure provides important information in the potential application of graphene as a template for nanocluster arrays.

Abstract

The structure of a single layer of graphene on Ru(0001) has been studied using surface x-ray diffraction. A surprising superstructure containing 1250 carbon atoms has been determined, whereby 25×25 graphene unit cells lie on 23×23 unit cells of Ru. Each supercell contains 2×2 crystallographically inequivalent subcells caused by corrugation. Strong intensity oscillations in the superstructure rods demonstrate that the Ru substrate is also significantly corrugated down to several monolayers and that the bonding between graphene and Ru is strong and cannot be caused by van der Waals bonds. Charge transfer from the Ru substrate to the graphene expands and weakens the C–C bonds, which helps accommodate the in-plane tensile stress. The elucidation of this superstructure provides important information in the potential application of graphene as a template for nanocluster arrays.

Statistics

Citations

193 citations in Web of Science®
195 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

115 downloads since deposited on 10 Feb 2009
10 downloads since 12 months
Detailed statistics

Additional indexing

Other titles:Unit cell of graphene on Ru(0001): a 25 x 25 supercell with 1250 carbon atoms
Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2008
Deposited On:10 Feb 2009 08:23
Last Modified:05 Apr 2016 12:50
Publisher:American Physical Society
ISSN:0031-9007
Publisher DOI:https://doi.org/10.1103/PhysRevLett.101.126102
Related URLs:http://arxiv.org/abs/0808.1853

Download

Preview Icon on Download
Preview
Content: Accepted Version
Filetype: PDF (Accepted manuscript, Version 2?)
Size: 1MB
View at publisher
Preview Icon on Download
Preview
Content: Accepted Version
Filetype: PDF (Accepted manuscript, Version 1)
Size: 758kB