Observation of direct vibrational excitation in gas-surface collisions of CO with Au(111): a new model system for surface dynamics.

Observation of direct vibrational excitation in gas-surface collisions of CO with Au(111): a new model system for surface dynamics.
复制标题

CO 与 Au(111) 气体表面碰撞中直接振动激发的观察:一种新的表面动力学模型系统

DOI:
10.1039/c2cp43351f
复制
发表时间:
2013
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
通讯作者:
Alec M. Wodtke
Alec M. Wodtke
中科院分区:
--
文献类型:
--
作者:
Tim Schäfer;Nils Bartels;Kai Golibrzuch;Christof Bartels;Hansjochen Köckert;Daniel J. Auerbach;Theofanis N. Kitsopoulos;Alec M. Wodtke

文献摘要

参考文献

被引文献

相似文献

报道了在平移能量Ei=0.45 eV时,CO与Au(111)发生碰撞时,CO从基态(v=0)到第一激发态(v=1)的振动激发。与过去的工作不同,我们可以排除一种激发机制,即在表面上暂时吸附,然后热化和脱附。散射CO分子的角分布很窄,与发生在亚ps时间尺度上的直接散射是一致的。绝对激发几率约为热容纳几率的3%。在373~973K范围内测得的激发表面温度依赖关系为类阿累尼乌斯曲线,其激活能等于振动激发所需的能量。我们的测量结果与振动激发机制是一致的,该机制涉及固体对CO振动的热激发电子-空穴对的耦合。
We report vibrational excitation of CO from its ground (v = 0) to first excited (v = 1) vibrational state in collision with Au(111) at an incidence energy of translation of EI = 0.45 eV. Unlike past work, we can exclude an excitation mechanism involving temporary adsorption on the surface followed by thermalization and desorption. The angular distributions of the scattered CO molecules are narrow, consistent with direct scattering occurring on a sub-ps time scale. The absolute excitation probabilities are about 3% of those expected from thermal accommodation. The surface temperature dependence of excitation, which was measured between 373 and 973 K, is Arrhenius-like with an activation energy equal to the energy required for vibrational excitation. Our measurements are consistent with a vibrational excitation mechanism involving coupling of thermally excited electron–hole pairs of the solid to CO vibration.
DOI: 10.1063/1.460182
发表时间: 1991
影响因子: 4.4
作者:
H. Michelsen;D. Auerbach
通讯作者: D. Auerbach
寻找 CO 与 Au(111) 气体表面碰撞中的直接振动激发
DOI: --
发表时间: 1993
期刊:
影响因子: --
作者:
C. Rettner
通讯作者: C. Rettner
DOI: --
发表时间: 1972
期刊:
影响因子: --
作者:
R. Imhof;F. H. Read;S. Beckett
通讯作者: S. Beckett
DOI: 10.1039/c0sc00141d
发表时间: 2010
期刊: Chemical Science
影响因子: 8.4
作者:
R. Cooper;I. Rahinov;D. Matsiev;D. Auerbach;A. Wodtke
通讯作者: A. Wodtke
使用电子刺激解吸作为振动激发物质源的 X 1Σ+ 和 3Π 一氧化碳的共振增强多光子电离光谱
DOI: 10.1063/1.472334
发表时间: 1996
影响因子: 4.4
作者:
S. Wurm;P. Feulner;D. Menzel
通讯作者: D. Menzel