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题名: Size-Selective Carbon Nanoclusters as Precursors to the Growth of Epitaxial Graphene
作者: Wang, Bo1;  Ma, Xiufang2, 3;  Caffio, Marco1;  Schaub, Renald1;  Li, Wei-Xue2, 3
关键词: Graphene ;  rhodium ;  coronene ;  carbon ;  STM ;  DFT ;  nucleation ;  growth
刊名: NANO LETTERS
发表日期: 2011-02-01
DOI: 10.1021/nl103053t
卷: 11, 期:2, 页:424-430
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Multidisciplinary ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary ;  Physics, Applied ;  Physics, Condensed Matter
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science ;  Physics
英文摘要: The 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.
关键词[WOS]: ENERGY-ELECTRON-DIFFRACTION ;  WAVE BASIS-SET ;  TUNNELING MICROSCOPE ;  SURFACE ;  PT(111) ;  RH(111)
语种: 英语
WOS记录号: WOS:000287049100021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142557
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.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:
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.
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