中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 力学研究所
  3. 中国科学院力学研究所
  4. 高温气体动力学国家重点实验室
Exponential relaxation of the energy and desorption dynamics of atoms colliding with a surface

文献类型：期刊论文

作者Zeng, Dandan2; Jiang, Jianzheng1,2; Liu, Chong1,2; Fan, Jing1,2; Fan J(樊菁); Jiang JZ(蒋建政); Ceng DD(曾丹丹); Liu C(刘崇)
刊名PHYSICA SCRIPTA
出版日期2024-03-01
卷号99期号:3页码:10
ISSN号0031-8949
关键词atom-surface interaction energy relaxation residence time molecular dynamics
DOI10.1088/1402-4896/ad2326
通讯作者Liu, Chong(chongliu@imech.ac.cn) ; Fan, Jing(jfan@imech.ac.cn)
英文摘要Atom-surface collisions are one of the most important topics in surface science. To further disclose the physical mechanism underlying atom-surface interaction at the microscopic level, we study the dynamics of an incident atom with a molecular dynamics simulation. Emphasis is put on the temporal evolutions of energy and residence times of the colliding atoms. The incident atoms experience two stages after colliding with the surface. First, the atoms relax to the equilibrium state in an exponential fashion. Then, the atoms become equilibrated with the surface and depart from the surface with a converged desorption rate. Two parameters are proposed to characterize the process: the characteristic energy relaxation time and the equilibrium residence time. At the relaxation stage, the desorption rate varies with the energy, and the probability distribution function (PDF) of the residence time obeys a power law. At the equilibrium state, the desorption rate is invariable, and the PDF of the residence time decays exponentially. We further find that the desorption rate for both stages can be calculated by a consistent Arrhenius equation, with the desorption activation energy and kinetic energy evolving with time in the relaxation stage. It appears that the gas-surface interaction dynamics can be explained by trapping-desorption theory in both the relaxation state and the equilibration state.
WOS关键词CLASSICAL-THEORY ; GAS ATOMS ; MODEL ; AR ; SCATTERING ; STICKING ; PROBABILITY ; WASHBOARD
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences ; [XDA0340000]
WOS研究方向Physics
语种英语
WOS记录号WOS:001159677900001
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://dspace.imech.ac.cn/handle/311007/94339]  
专题力学研究所_高温气体动力学国家重点实验室
通讯作者Liu, Chong; Fan, Jing
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Zeng, Dandan,Jiang, Jianzheng,Liu, Chong,et al. Exponential relaxation of the energy and desorption dynamics of atoms colliding with a surface[J]. PHYSICA SCRIPTA,2024,99(3):10.
APA Zeng, Dandan.,Jiang, Jianzheng.,Liu, Chong.,Fan, Jing.,樊菁.,...&刘崇.(2024).Exponential relaxation of the energy and desorption dynamics of atoms colliding with a surface.PHYSICA SCRIPTA,99(3),10.
MLA Zeng, Dandan,et al."Exponential relaxation of the energy and desorption dynamics of atoms colliding with a surface".PHYSICA SCRIPTA 99.3(2024):10.

入库方式： OAI收割

来源：力学研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。