MOLECULAR-DYNAMICS SIMULATIONS OF REACTIONS BETWEEN MOLECULES - HIGH-ENERGY PARTICLE BOMBARDMENT OF ORGANIC FILMS

被引：50

作者：

TAYLOR, RS ^{[1
]}

GARRISON, BJ ^{[1
]}

机构：

[1] PENN STATE UNIV,DEPT CHEM,UNIVERSITY PK,PA 16802

来源：

LANGMUIR | 1995年 / 11卷 / 04期

关键词：

D O I：

10.1021/la00004a030

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The high-energy particle bombardment of a molecular film adsorbed upon a metal substrate has been investigated via molecular dynamics computer simulations with an empirical many-body potential energy function constructed for studying reactive dynamics. The specific system modeled is the bombardment of an ethylidyne (C2H3) overlayer adsorbed on Pt(111) by a 500-eV Ar atom beam. Approximately 80% of the ejected hydrocarbon species originate from a single C2H3 adsorbate, while the others result from reactions between two C2H3 adsorbates. A study of the internal energies of all of the ejected hydrocarbon aggregates reveals that those originating from a single C2H3 adsorbate are generally stable to any further fragmentation or rearrangement. Examples of common ejection mechanisms for species which originate from a single adsorbate, such as CH3, C2H3, or HCCH, and those which originate from more than one adsorbate, such as CH4, are given.

引用

页码：1220 / 1228

页数：9

共 77 条

[31] MOLECULAR DESORPTION INDUCED BY HEAVY PARTICLE BOMBARDMENT OF SOLIDS [J].