继电器
空格(标点符号)
化学物理
Atom(片上系统)
材料科学
原子物理学
天体生物学
纳米技术
物理
量子力学
操作系统
功率(物理)
计算机科学
嵌入式系统
作者
Takashi Kumagai,Akitoshi Shiotari,Hiroshi Okuyama,S. Hatta,Tetsuya Aruga,Ikutaro Hamada,Thomas Frederiksen,H. Ueba
出处
期刊:Nature Materials
[Springer Nature]
日期:2011-11-27
卷期号:11 (2): 167-172
被引量:108
摘要
Hydrogen bonds are the path through which protons and hydrogen atoms can be transferred between molecules. The relay mechanism, in which H-atom transfer occurs in a sequential fashion along hydrogen bonds, plays an essential role in many functional compounds. Here we use the scanning tunnelling microscope to construct and operate a test-bed for real-space observation of H-atom relay reactions at a single-molecule level. We demonstrate that the transfer of H-atoms along hydrogen-bonded chains assembled on a Cu(110) surface is controllable and reversible, and is triggered by excitation of molecular vibrations induced by inelastic tunnelling electrons. The experimental findings are rationalized by ab initio calculations for adsorption geometry, active vibrational modes and reaction pathway, to reach a detailed microscopic picture of the elementary processes.
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