Tuning structural and mechanical properties of two-dimensional molecular crystals: The roles of carbon side chains

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	Tuning structural and mechanical properties of two-dimensional molecular crystals: The roles of carbon side chains
	Cun HY; Wang YL; Du SX; Zhang L; Zhang LZ; Yang B; He XB; Wang Y; Zhu XY(朱雪燕); Yuan QZ(袁泉子); Zhao YP(赵亚溥); Ouyang M; Hofer WA; Pennycook SJ; Gao HJ; Wang, YL; Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
发表期刊	NANO LETTERS
	2012-03-01
卷号	12 期号:3 页码:1229-1234
ISSN	1530-6984
摘要	A key requirement for the future applicability of molecular electronics devices is a resilience of their properties to mechanical deformation. At present, however, there is no fundamental understanding of the origins of mechanical properties of molecular films. Here we use quinacridone, which possesses flexible carbon side chains, as a model molecular system to address this issue. Eight molecular configurations with different molecular coverage are identified by scanning tunneling microscopy. Theoretical calculations reveal quantitatively the roles of different molecule-molecule and molecule-substrate interactions and predict the observed sequence of configurations. Remarkably, we find that a single Young's modulus applies for all configurations, the magnitude of which is controlled by side chain length, suggesting a versatile avenue for tuning not only the physical and chemical properties of molecular films but also their elastic properties.
关键词	Two-dimensional Molecular Crystal Molecular Side Chain Elastic Properties Self-assembly Scanning Tunneling Microscopy Quinacridone Derivatives Surfaces Electronics Networks Solids
学科领域	新型材料的力学问题
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000301406800019
项目资助者	The authors thank L. Bartels and K-H. Ernst for fruitful discussions. This works supported by NSFC, MOST, CAS, and SSC in China. M.O. acknowledges support from U.S. National Science Foundation (Career Award). W.A.H. thanks the Royal Society London for support. S.J.P. was supported by the U.S. Dept. of Energy, Office of Science, Materials Sciences and Engineering Division.
课题组名称	LNM纳/微系统力学与物理力学
论文分区	一类
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/46723
专题	非线性力学国家重点实验室
通讯作者	Wang, YL; Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Cun HY,Wang YL,Du SX,et al. Tuning structural and mechanical properties of two-dimensional molecular crystals: The roles of carbon side chains[J]. NANO LETTERS,2012,12,3,:1229-1234.
APA	Cun HY.,Wang YL.,Du SX.,Zhang L.,Zhang LZ.,...&Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China..(2012).Tuning structural and mechanical properties of two-dimensional molecular crystals: The roles of carbon side chains.NANO LETTERS,12(3),1229-1234.
MLA	Cun HY,et al."Tuning structural and mechanical properties of two-dimensional molecular crystals: The roles of carbon side chains".NANO LETTERS 12.3(2012):1229-1234.

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