| 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.
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| Source Publication | NANO LETTERS
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| 2012-03-01 | |
| Volume | 12Issue:3Pages:1229-1234 |
| ISSN | 1530-6984 |
| Abstract | 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. |
| Keyword | Two-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 |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000301406800019 |
| Funding Organization | 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. |
| Department | LNM纳/微系统力学与物理力学 |
| Classification | 一类 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/46723 |
| Collection | 非线性力学国家重点实验室 |
| Corresponding Author | Wang, 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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