期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 6, 期 17, 页码 3453-3457出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.5b01501
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资金
- National Science Foundation Center for Chemical Innovation on Chemistry at the Space-Time Limit (CaSTL) [CHE-1414466]
- Chemical Sciences, Geosciences, and Biosciences, office of Basic Energy Science, U.S. Department of Energy [DE-FG02-06ER15826]
- Chinese National Science Foundation [11474056]
- U.S. Department of Energy (DOE) [DE-FG02-06ER15826] Funding Source: U.S. Department of Energy (DOE)
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1414466] Funding Source: National Science Foundation
Using inelastic electron tunneling spectroscopy with the scanning tunneling microscope (STM-IETS) and density functional theory calculations (DFT), we investigated properties of a single H-2 molecule trapped in nanocavities with controlled shape and separation between the STM tip and the Au (110) surface. The STM tip not only serves for the purpose of characterization, but also is directly involved in modification of chemical environment of molecule. The bond length of H2 expands in the atop cavity, with a tendency of dissociation when the gap closes, whereas it remains unchanged in the trough cavity. The availability of two substantially different cavities in the same setup allows understanding of H-2 adsorption on noble metal surfaces and sets a path for manipulating a single chemical bond by design.
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