| 功能纳米结构可控生长的新途径:非模板选择性自组装 |
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| 引用本文： | 杜世萱,季威,高鸿钧.功能纳米结构可控生长的新途径:非模板选择性自组装[J].物理,2007,36(6):427-429. |
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| 作者姓名： | 杜世萱 季威 高鸿钧 |
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| 作者单位： | 中国科学院物理研究所,北京凝聚态物理国家实验室,北京,100080 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 文章介绍了一种非模板选择性自组装纳米结构的方法.从实验和理论上研究了两种有机分子在Ag单晶不同表面上的吸附行为,发现在Ag（775）基底上PTCDA分子会完全吸附在（111）台阶面上,而DMe-DCNQI分子则完全吸附在（221）台阶面上.该研究还阐明了PTCDA分子与基底原子之间的相互作用机制,提出了PTCDA与基底之间的相互作用是通过分子末端官能团的氧原子实现的,中心的π共轭区域与基底相排斥,理论模拟得到的氧原子的NIXSW相干长度以及碳原子的近边X射线吸收谱与实验结果符合得较好.
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| 关 键 词： | 非模板自组装 选择性吸附 第一性原理计算 |
| 修稿时间： | 2007-02-122007-04-06 |
Selective nontemplated adsorption of organic molecules on nanofacets and the role of bonding patterns |
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| DU Shi-Xuan,JI Wei,GAO Hong-Jun.Selective nontemplated adsorption of organic molecules on nanofacets and the role of bonding patterns[J].Physics,2007,36(6):427-429. |
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| Authors: | DU Shi-Xuan JI Wei GAO Hong-Jun |
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| Institution: | Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | A key element of functionalizing nanocrystals with organic molecules is the nontemplated selective adsorption of different molecules on different facets.Here we report scanning-tunneling-microscopy images of perylene-3,4,9,10-tetracarboxylic-dianhydride and 2,5-dimethyl-N,N'-dicyanoquinonediimine on silver,demonstrating selective adsorption on different facets.We also report first-principles calculations that account for the data and show that bonding,which controls selectivity,occurs via the end atoms,while the molecule's midregion arches away from the substrate.The results are also consistent with data that have been interpreted in terms of bonding via the midregion. |
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| Keywords: | STM |
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