Direct Observation of Twin van der Waals Molecular Chains

被引:1
|
作者
Fang, Siyuan [1 ]
Zahl, Percy [2 ]
Wang, Xuelong [3 ]
Liu, Ping [3 ]
Stacchiola, Dario [2 ]
Hu, Yun Hang [1 ]
机构
[1] Michigan Technol Univ, Dept Mat Sci & Engn, Houghton, MI 49931 USA
[2] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA
[3] Brookhaven Natl Lab, Chem Div, Upton, NY 11973 USA
来源
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2023年 / 14卷 / 47期
基金
美国国家科学基金会;
关键词
SCANNING PROBE MICROSCOPY; NONCOVALENT INTERACTIONS; FIELD;
D O I
10.1021/acs.jpclett.3c02914
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
The van der Waals (vdW) assemblies are the most common structures of materials. However, direct mapping of intermolecular electron clouds of a vdW assembly has never been obtained, even though the intramolecular electron clouds were visualized by atomic-resolution techniques. In this report, we unprecedentedly mapped the intermolecular electron cloud of the assemblies of ethanol molecules via ethyl groups with high-resolution atomic force microscopy and scanning tunneling microscopy at 5 K, leading to the first visualization of vdW molecular chains, in which ethanol molecules assemble into twin vdW molecular chains in a reverse parallel configuration on the Ag(111) plane. Furthermore, spontaneous order-disorder transitions in the chain were dynamically observed, suggesting its unusual properties different from those of 2D vdW materials. These findings provide an "eye" to see the atomic world of vdW materials.
引用
收藏
页码:10710 / 10716
页数:7
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