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Au(111)表面DCDPP分子π-π堆叠的自组装特性研究

许望伟, 郝振亮, 赵慧, 卢建臣, 蔡金明

许望伟, 郝振亮, 赵慧, 卢建臣, 蔡金明. Au(111)表面DCDPP分子π-π堆叠的自组装特性研究[J]. 真空科学与技术学报, 2021, 41(4): 341-347. DOI: 10.13922/j.cnki.cjvst.202004005
引用本文: 许望伟, 郝振亮, 赵慧, 卢建臣, 蔡金明. Au(111)表面DCDPP分子π-π堆叠的自组装特性研究[J]. 真空科学与技术学报, 2021, 41(4): 341-347. DOI: 10.13922/j.cnki.cjvst.202004005
XU Wangwei, HAO Zhenliang, ZHAO Hui, LU Jianchen, CAI Jinming. Self-Assembly of Organic Molecules with π-π Interactions on Gold Surfaces[J]. CHINESE JOURNAL OF VACUUM SCIENCE AND TECHNOLOGY, 2021, 41(4): 341-347. DOI: 10.13922/j.cnki.cjvst.202004005
Citation: XU Wangwei, HAO Zhenliang, ZHAO Hui, LU Jianchen, CAI Jinming. Self-Assembly of Organic Molecules with π-π Interactions on Gold Surfaces[J]. CHINESE JOURNAL OF VACUUM SCIENCE AND TECHNOLOGY, 2021, 41(4): 341-347. DOI: 10.13922/j.cnki.cjvst.202004005

Au(111)表面DCDPP分子π-π堆叠的自组装特性研究

基金项目: 

中国国家自然科学基金项目(Nos.11674136、61901200和5162023);中组部千人计划青年项目(No.13231097600);中国科学院B类先导专项(No.618820190014);云南省百名海外高层次人才(No.132314119401);云南省中青年学术和技术带头人后备人才(No.2017HB010)

详细信息
    通讯作者:

    蔡金明,E-mail:j.cai@kust.edu.cn

  • 中图分类号: O613.71;O647.11

Self-Assembly of Organic Molecules with π-π Interactions on Gold Surfaces

  • 摘要: 为了研究存在π-π堆叠对自组装结构的调控行为,本文利用超高真空扫描隧道显微镜研究了4,6,-二氯-2,5,-联苯嘧啶(DCDPP)分子在Au (111)上的自组装行为。DCDPP分子中旋转的5-苯环使分子中间能够存在π-π相互作用。在π堆叠,氢键等多种分子相互作用的竞争下,低覆盖度时,DCDPP在Au (111)上会形成一种链状结构和一种二维有序结构。而高覆盖度下,DCDPP将通过更高密度的自组装结构来克服高覆盖度带来的应力。这种由于不同分子间作用力和覆盖度导致不同的自主装结构的研究,对于有机电子器件的制备具有指导意义。
    Abstract: The self-assembly behavior of 4,6,-dichloro-2,5,and-biphenyl pyrimidine(DCDPP) molecules on Au(111) surface was investigated with ultra-high vacuum scanning tunneling microscope for manipulation of self-assembly structure via π-π interaction.The influence of the DCDPP molecular coverage on the self-assembly nano-structures was experimentally measured and theoretically analyzed.The preliminary results show that the molecular coverage made the difference.For instance, the rotating 5-benzene ring in DCDPP molecule was responsible for the π-π interactions; a low coverage of DCDPP molecule self-assembled into stable chains and well-ordered 2 D structures; a higher coverage self-assembled into different high density 2 D islands, possibly because of the localized stress.We suggest that the results be of some basic and technological interest in development of molecular electronic devices.
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出版历程
  • 收稿日期:  2020-04-04
  • 网络出版日期:  2023-09-11

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