Rotational and Vibrational Excitations of a Single Water Molecule by Inelastic Electron Tunneling Spectroscopy
| Autor: | Jiyu Xu, Dong Hao, Jianmei Li, Qiuhao Xu, Xinyan Shan, Xinghua Lu, Xiangqian Tang, Sheng Meng, Lihuan Sun |
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| Rok vydání: | 2020 |
| Předmět: |
Potential well
Materials science Inelastic electron tunneling spectroscopy 02 engineering and technology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics 0104 chemical sciences law.invention Quantum state law Condensed Matter::Superconductivity Molecule General Materials Science Density functional theory Physical and Theoretical Chemistry Scanning tunneling microscope 0210 nano-technology Quantum Quantum tunnelling |
| Zdroj: | The journal of physical chemistry letters. 11(5) |
| ISSN: | 1948-7185 |
| Popis: | Two low-energy excitations of a single water molecule are observed via inelastic electron tunneling spectroscopy, where a significant enhancement is achieved by attaching the molecule to the tip apex in a scanning tunneling microscope. Density functional theory simulations and quantum mechanical calculations of an asymmetric top are carried out to reveal the origin of both excitations. Variations in tunneling junction separation give rise to the quantum confinement effect on the quantum state of a water molecule in the tunneling junction. Our results demonstrate a potential method for measuring the dynamic behavior of a single molecule confined in a tunneling junction, where the molecule–substrate interaction can be purposely tuned. |
| Databáze: | OpenAIRE |
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