Title | Nuclear quantum effects of hydrogen bonds probed by tip-enhanced inelastic electron tunneling |
Authors | Guo, Jing Lu, Jing-Tao Feng, Yexin Chen, Ji Peng, Jinbo Lin, Zeren Meng, Xiangzhi Wang, Zhichang Li, Xin-Zheng Wang, En-Ge Jiang, Ying |
Affiliation | Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China. Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China. Hunan Univ, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China. Peking Univ, Sch Phys, Beijing 100871, Peoples R China. Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China. Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China. Li, XZ (reprint author), Peking Univ, Sch Phys, Beijing 100871, Peoples R China. Li, XZ Wang, EG Jiang, Y (reprint author), Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China. |
Keywords | MOLECULE VIBRATIONAL SPECTROSCOPY SOLID-STATE WATER JUNCTIONS MICROSCOPY RESOLUTION PROTON |
Issue Date | 2016 |
Publisher | SCIENCE |
Citation | SCIENCE.2016,352,(6283),321-325. |
Abstract | We report the quantitative assessment of nuclear quantum effects on the strength of a single hydrogen bond formed at a water-salt interface, using tip-enhanced inelastic electron tunneling spectroscopy based on a scanning tunneling microscope. The inelastic scattering cross section was resonantly enhanced by "gating" the frontier orbitals of water via a chlorine-terminated tip, so the hydrogen-bonding strength can be determined with high accuracy from the red shift in the oxygen-hydrogen stretching frequency of water. Isotopic substitution experiments combined with quantum simulations reveal that the anharmonic quantum fluctuations of hydrogen nuclei weaken the weak hydrogen bonds and strengthen the relatively strong ones. However, this trend can be completely reversed when a hydrogen bond is strongly coupled to the polar atomic sites of the surface. |
URI | http://hdl.handle.net/20.500.11897/434112 |
ISSN | 0036-8075 |
DOI | 10.1126/science.aaf2042 |
Indexed | SCI(E) PubMed |
Appears in Collections: | 物理学院 |