Li Shaowei, Chen Siyu, Li Jie, Wu Ruqian, Ho W
Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA.
State Key Laboratory of Surface Physics and Key Laboratory of Computational Physical Sciences, Fudan University, Shanghai, China 200433.
Phys Rev Lett. 2017 Oct 27;119(17):176002. doi: 10.1103/PhysRevLett.119.176002. Epub 2017 Oct 26.
We report single-molecule conformational transitions with joint angstrom-femtosecond resolution by irradiating the junction of a scanning tunneling microscope with femtosecond laser pulses. An isolated pyrrolidine molecule adsorbed on a Cu(001) surface undergoes reversible transitions between two conformational states. The transition rate decays in time and exhibits sinusoidal oscillations with periods of specific molecular vibrations. The dynamics of this transition depends sensitively on the molecular environment, as exemplified by the effects of another molecule in proximity.
我们通过用飞秒激光脉冲照射扫描隧道显微镜的结，报告了具有埃-飞秒联合分辨率的单分子构象转变。吸附在Cu(001)表面的孤立吡咯烷分子在两种构象状态之间经历可逆转变。转变速率随时间衰减，并呈现出具有特定分子振动周期的正弦振荡。这种转变的动力学敏感地依赖于分子环境，邻近另一个分子的影响就是例证。
