共 45 条
Role of Fluorine Interactions in the Self-Assembly of a Functionalized Anthradithiophene Monolayer on Au(111)
被引:11
作者:
Huston, Shawn M.
[2
]
Wang, Jiuyang
[1
]
Loth, Marsha A.
[3
]
Anthony, John E.
[3
]
Conrad, Brad R.
[2
]
Dougherty, Daniel B.
[1
]
机构:
[1] N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA
[2] Appalachian State Univ, Dept Phys & Astron, Boone, NC 28608 USA
[3] Univ Kentucky, Dept Chem, Lexington, KY 40506 USA
基金:
美国国家科学基金会;
关键词:
GENERALIZED GRADIENT APPROXIMATION;
FIELD-EFFECT TRANSISTORS;
THIN-FILM TRANSISTORS;
STRUCTURAL MOTIF;
HIGH-PERFORMANCE;
PENTACENE;
PSEUDOPOTENTIALS;
THERMOCHEMISTRY;
MOLECULES;
EXCHANGE;
D O I:
10.1021/jp307539q
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Scanning tunneling microscopy studies of the first monolayer of 2,8-difluoro-5,11-(bis)triethylsilylethynyl anthradithiophene on Au(111) reveal two ordered structures with anthradithiophene planes parallel to the substrate. Submolecular resolution STM images demonstrate structures with a close approach of fluorine-sulfur and fluorine-fluorine atoms in the ordered structures. This provides evidence for the importance of noncovalent F-S and F-F in driving 2D self-assembly in the monolayer. Spectroscopic studies indicate a transport gap of 2.4 eV that is insensitive to the local domain structures, as expected for weak intermolecular interactions.
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页码:21465 / 21471
页数:7
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