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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.
Source PublicationNANO LETTERS
2012-03-01
Volume12Issue:3Pages:1229-1234
ISSN1530-6984
AbstractA 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.
KeywordTwo-dimensional Molecular Crystal Molecular Side Chain Elastic Properties Self-assembly Scanning Tunneling Microscopy Quinacridone Derivatives Surfaces Electronics Networks Solids
Subject Area新型材料的力学问题
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000301406800019
Funding OrganizationThe 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.
DepartmentLNM纳/微系统力学与物理力学
Classification一类
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Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46723
Collection非线性力学国家重点实验室
Corresponding AuthorWang, YL; Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
Recommended Citation
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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