通过量子道在Ag(110) 表面上的单个分子中的双转移的直接观察
Matthias Koch1, Mark Pagan2, Mats Persson2
1Department of Physical Chemistry, Fritz-Haber Institute of the Max-Planck Society , Faradayweg 4-6, Berlin 14195, Germany.
Journal of the American Chemical Society
|August 23, 2017
概括
这项研究直接使用扫描道显微镜观察分子中的双原子转移. 这些发现揭示了由振动刺激和尖端操纵影响的阶段性道化机制.
科学领域:
- 量子化学
- 表面科学
- 分子动力学
背景情况:
- 量子道在化学和生物过程中至关重要.
- 复杂系统中的多粒子道并未得到充分理解.
研究的目的:
- 在分子中直接观察和理解双原子的转移.
- 调查多粒子道的机制和影响因素.
主要方法:
- 使用冷扫描道显微镜 (STM) 进行直接观察.
- 使用密度函数理论 (DFT) 的计算.
- 对多种同位素分析的动态同位素效应 (KIE).
主要成果:
- 观察到低于10K的温度独立的复合,表明道化.
- 通过KIE分析和DFT证明了阶段性转移机制.
- 显示振动激发和STM尖端操纵影响了道的速度.
结论:
- 在Ag上逐步转移原子占主导地位.
- 量子道的动态可以通过外部刺激来控制,
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