Suppression of Grain Boundaries in Graphene Growth on Superstructured Mn-Cu(111) Surface

Journal Article · Sun Jan 01 00:00:00 EST 2012 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.109.265507· OSTI ID:1089789

Chen, Wei ^[1]; Chen, Hua ^[1]; Lan, Haiping ^[1]; Cui, Ping ^[1]; Schulze, Tim P. ^[2]; Zhu, Wenguang ^[3]; Zhang, Zhenyu ^[4]

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1. Hefei National Laboratory for the Physical Sciences at Microscale
2. University of Tennessee, Knoxville (UTK)
3. ORNL
4. ICQD, University of S&T, Hefei, China

Asundesirabledefects,grainboundaries(GBs)arewidespreadinepitaxialgrapheneusingexistinggrowthmethodsonmetalsubstrates.Employingdensityfunctionaltheorycalculations,we rstidentifythatthemisorientationsofcarbonislandsnucleatedonaCu(111)surfaceleadtotheformationofGBsastheislandscoalesce.Wethenproposeatwo-stepkineticpathwaytoeffectivelysuppresstheformationofGBs.Inthe rststep,largearomatichydrocarbonmoleculesaredepositedontoa 3p 3psuper-structuredCu-Mnalloyedsurfacetoseedtheinitialcarbonclustersofasingleorientation;inthesecondstep,theseededislandsareenlargedthroughnormalchemicalvapordepositionofmethanetoformacompletegraphenesheet.Thepresentapproachpromisestoovercomeastandingobstacleinlargescalesingle-crystalgraphenefabrication.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1089789
• Journal Information: Physical Review Letters, Vol. 109, Issue 26; ISSN 0031--9007
• Country of Publication: United States
• Language: English