Insight into STM image contrast of n-tetradecane and n-hexadecane molecules on highly oriented pyrolytic graphite

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	Insight into STM image contrast of n-tetradecane and n-hexadecane molecules on highly oriented pyrolytic graphite
	Zhao, M ; Jiang, P ; Deng, K ; Yu, AF ; Hao, YZ ; Xie, SS ; Sun, JL
刊名	APPLIED SURFACE SCIENCE
	2011
卷号	257 期号:8 页码:3243
关键词	SELF-ASSEMBLED MONOLAYERS SCANNING-TUNNELING-MICROSCOPY ENERGY ELECTRON-DIFFRACTION NORMAL-PARAFFINS THIN-CRYSTALS AU(111) ALKANES INTERFACE SURFACE CYCLOHEXANE
ISSN号	0169-4332
通讯作者	Jiang, P: Natl Ctr Nanosci & Technol, Beiyitiao 11, Beijing 100190, Peoples R China.
中文摘要	Two-dimensional ordered patterns of n-tetradecane (n-C(14)H(30)) and n-hexadecane (n-C(16)H(34)) molecules at liquid/graphite interface have been directly imaged using scanning tunneling microscope (STM) under ambient conditions. STM images reveal that the two different kinds of molecules self-organize into ordered lamellar structures in which alkane chains of the molecules extend along one of three equivalent lattice axes of highly oriented pyrolytic graphite (HOPG) basal plane. For n-C14H30 molecules, the molecular axes are observed to tilt by 60 degrees with respect to inter-lamellar trough lines and the carbon backbones of the alkane chains are perpendicular to the HOPG basal plane in an all-trans conformation. However, for n-C(16)H(34) molecules, the molecular axes are perpendicular to lamellar borders (90 degrees) and the planes of the all-trans carbon skeletons are parallel to the graphite basal plane. The results clearly indicate that outmost hydrogen atoms of the alkane chains dominate atom-scaled features of the STM images. That is, in the case of long-chain alkane molecules, topographic effects dominantly determine STM image contrast of the methylene regions of the alkane chains that are adsorbed on HOPG. (C) 2010 Elsevier B. V. All rights reserved.
收录类别	SCI
资助信息	National Natural Science Foundation of China [50772024]; National Basic Research Program of China [2006CB932600, 2009CB930702]; Opening Research Foundation of National Center for Nanoscience and Technology (NCNST), China; Chinese Academy of Sciences [KJCX2-YW-M13]
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/40028]
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	Zhao, M,Jiang, P,Deng, K,et al. Insight into STM image contrast of n-tetradecane and n-hexadecane molecules on highly oriented pyrolytic graphite[J]. APPLIED SURFACE SCIENCE,2011,257(8):3243.
APA	Zhao, M.,Jiang, P.,Deng, K.,Yu, AF.,Hao, YZ.,...&Sun, JL.(2011).Insight into STM image contrast of n-tetradecane and n-hexadecane molecules on highly oriented pyrolytic graphite.APPLIED SURFACE SCIENCE,257(8),3243.
MLA	Zhao, M,et al."Insight into STM image contrast of n-tetradecane and n-hexadecane molecules on highly oriented pyrolytic graphite".APPLIED SURFACE SCIENCE 257.8(2011):3243.