Non-activated pathway in angle-resolved study of H-2 molecules produced in the abstraction reaction of incident H atoms on hydrogenated Si(100)

作者：Bisson, R^*; Yang, SH; Philippe, L; Chatelet, M

来源：Chemical Physics Letters, 2005, 411(4-6): 429-433.

DOI：10.1016/j.cplett.2005.06.072

We present the first angle resolved study of H-2 Molecules coming from a hydrogenated Si(100)-2 x 1 surface at 650 K exposed to a chopped hydrogen atomic beam under fixed incidence angle. We get an exceptionally wide angular distribution, which can be fitted by cos(n)O with n < 1. We interpret this new result by a non-activated pathway involving collision induced desorption and site-specific hot atom abstraction on two neighbor Si dimers inside a dimer row after passing through a transition state similar to the inter-dimer 4H reaction path, recently proposed in a H-2/Si(100)-2 x 1 system.

• 出版日期2005-8-15
• 单位中山大学