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

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	Sequential assembly of metal-free phthalocyanine on few-layer epitaxial graphene mediated by thickness-dependent surface potential
	Gao, YB ; Zhang, YF ; Ren, J ; Li, DH ; Gao, T ; Zhao, RQ ; Yang, YL ; Meng, S ; Wang, C ; Liu, ZF
刊名	NANO RESEARCH
	2012
卷号	5 期号:8 页码:543
关键词	ELECTROSTATIC FORCE MICROSCOPY QUANTITATIVE-ANALYSIS ELECTRONIC-STRUCTURE BILAYER GRAPHENE FILMS
ISSN号	1998-0124
通讯作者	Zhang, YF (reprint author), 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.
中文摘要	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.
收录类别	SCI
资助信息	National Natural Science Foundation of China [21073003, 20973013, 51072004, 50821061, 20833001]; Ministry of Science and Technology of China [2011CB921903, 2012CB921404, 2007CB936203, 2007CB936802]; Foundation for the Authors of National Excellent Doctoral Dissertations of China [201087]
语种	英语
公开日期	2013-09-24
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/52490]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Gao, YB,Zhang, YF,Ren, J,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.
APA	Gao, YB.,Zhang, YF.,Ren, J.,Li, DH.,Gao, T.,...&Liu, ZF.(2012).Sequential assembly of metal-free phthalocyanine on few-layer epitaxial graphene mediated by thickness-dependent surface potential.NANO RESEARCH,5(8),543.
MLA	Gao, YB,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.