Size-Selective Carbon Nanoclusters as Precursors to the Growth of Epitaxial Graphene
Wang, Bo1; Ma, Xiufang2,3; Caffio, Marco1; Schaub, Renald1; Li, Wei-Xue2,3
KeywordGraphene Rhodium Coronene Carbon Stm Dft Nucleation Growth
Source PublicationNANO LETTERS
Indexed BySCI
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
AbstractThe nucleation and growth mechanisms of graphene on Rh(111) via temperature-programmed growth of C(2)H(4) are studied by scanning tunneling microscopy and spectroscopy, and by density functional theory calculations. By combining our experimental and first-principles approaches, we show that carbon nanoislands form in the initial stages of graphene growth, possessing an exclusive size of seven honeycomb carbon units (hereafter labeled as 7C(6)). These dusters adopt a domelike hexagonal shape indicating that bonding to the substrate is. localized on the peripheral C atoms. Smoluchowski ripening is identified as the dominant mechanism leading to the formation of graphene, with the size-selective carbon islands as precursors. Control experiments and calculations, whereby coronene molecules, the hydrogenated analogues of 7C(6), are deposited on Rh(111), provide an unambiguous structural and chemical identification of the 7C(6) building blocks.
WOS IDWOS:000287049100021
Citation statistics
Cited Times:100[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Univ St Andrews, Sch Chem, Scottish Ctr Interdisciplinary Surface Spect, St Andrews KY16 9ST, Fife, Scotland
2.Chinese Acad Sci, Dalian Inst Chem Phys, Ctr Theoret & Computat Chem, Dalian 116023, Peoples R China
3.Chinese Acad Sci, State Key Lab Catalysis, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Wang, Bo,Ma, Xiufang,Caffio, Marco,et al. Size-Selective Carbon Nanoclusters as Precursors to the Growth of Epitaxial Graphene[J]. NANO LETTERS,2011,11(2):424-430.
APA Wang, Bo,Ma, Xiufang,Caffio, Marco,Schaub, Renald,&Li, Wei-Xue.(2011).Size-Selective Carbon Nanoclusters as Precursors to the Growth of Epitaxial Graphene.NANO LETTERS,11(2),424-430.
MLA Wang, Bo,et al."Size-Selective Carbon Nanoclusters as Precursors to the Growth of Epitaxial Graphene".NANO LETTERS 11.2(2011):424-430.
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