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Sequential assembly of metal-free phthalocyanine on few-layer epitaxial graphene mediated by thickness-dependent surface potential

文献类型：期刊论文

作者Gao, Yabo1; Zhang, Yanfeng1; Ren, Jun2; Li, Denghua3; Gao, Teng1; Zhao, Ruiqi1; Yang, Yanlian3; Meng, Sheng2; Wang, Chen3; Liu, Zhongfan1
刊名NANO RESEARCH
出版日期2012-08-01
卷号5期号:8页码:543-549
关键词Scanning Tunneling Microscopy (Stm) Epitaxial Graphene Phthalocyanine Self-assembly Electrostatic Force Microscopy (Efm)
ISSN号1998-0124
DOI10.1007/s12274-012-0239-9
英文摘要Due to strong interactions between epitaxial graphene and SiC(0001) substrates, the overlayer charge density induced by the interface charging effect is much more attenuated than that of exfoliated graphene on SiO2. We report herein a quantitive detection of the charge properties of few-layer graphene by surface potential measurements using electrostatic force microscopy (EFM). A minor difference in surface potential is observed to mediate a sequential assembly of metal-free phthalocyanine (H2Pc) on monolayer, bilayer and trilayer graphenes, as demonstrated by scanning tunneling microscopy (STM). In order to understand this, we further executed density functional theory (DFT) calculations which showed higher adsorption energies for Pc on thinner graphenes. In this case, we attribute the unique growth behavior of Pc to its variable adsorption energies on few-layer graphene, and in turn the layer charge variations from the viewpoint of energy minimizations. This work is expected to provide fundamental data useful for related nanodevice fabrications.
语种英语
WOS记录号WOS:000307398100004
出版者TSINGHUA UNIV PRESS
源URL[http://ir.iccas.ac.cn/handle/121111/43409]  
专题中国科学院化学研究所
通讯作者Zhang, Yanfeng
作者单位1.Peking Univ, State Key Lab Struct Chem Unstable & Stable Speci, Acad Adv Interdisciplinary Studies,Ctr Nanochem C, Beijing Natl Lab Mol Sci,Coll Chem & Mol Engn, Beijing 100871, Peoples R China
2.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China
3.Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Gao, Yabo,Zhang, Yanfeng,Ren, Jun,et al. Sequential assembly of metal-free phthalocyanine on few-layer epitaxial graphene mediated by thickness-dependent surface potential[J]. NANO RESEARCH,2012,5(8):543-549.
APA Gao, Yabo.,Zhang, Yanfeng.,Ren, Jun.,Li, Denghua.,Gao, Teng.,...&Liu, Zhongfan.(2012).Sequential assembly of metal-free phthalocyanine on few-layer epitaxial graphene mediated by thickness-dependent surface potential.NANO RESEARCH,5(8),543-549.
MLA Gao, Yabo,et al."Sequential assembly of metal-free phthalocyanine on few-layer epitaxial graphene mediated by thickness-dependent surface potential".NANO RESEARCH 5.8(2012):543-549.

入库方式： OAI收割

来源：化学研究所

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