| 本文已被：浏览 8241次 下载 1806次 |
码上扫一扫！ |
|
|
| DFT Investigation of O2 Adsorption on Si(001)-(2*2*1):H |
|
Xiao-yan Deng1,2, Chun Yang*1, Ming-xiu Zhou1, Wei-fei Yu3, Jin-shan Li3
|
|
1.Key Lab of Computer Software, Sichuan Normal University, Chengdu 610068, China;2.PhysicsDepartment, Hebei North University, Zhangjiakou 075000, China;3.China Academy of EngineeringPhysics, Mianyang 621000, China
|
|
| Abstract: |
| A novel model was developed to theoretically evaluate the O2 adsorption on H-terminated Si(001)-(2*2*1) surface. The periodic boundary condition, the ultrasoft pseudopotentials technique based on density functional theory (DFT) with generalized gradient approximation (GGA) functional were applied in our ab initio calculations. By analyzing bonding energy on site, the favourable adsorption site was determined. The calculations also predicted that the adsorption products should be Si=O and H2O. This theoretical study supported the reaction mechanism provided by Kovalev et al. The results were also a base for further investigation of some more complex systems such as the oxidation on porous silicon surface. |
| Key words: Si(001)-(2*2*1):H, O2, Density functional theory (DFT), Adsorption site |
| FundProject:supported by the Application and Basic Research of Sichuan Province (02GY0292006), the
Key Foundation of Sichuan Province Education Bureau
(2002N086) and the National Basic Research Program
of China ("973 Program", No.51310Z03). |
|
| Si(001)-(2*2*1):H表面O2吸附的密度泛函理论研究 |
|
邓小燕 1,2, 杨春 1, 周明秀 1, 郁卫飞 3, 李金山 3
|
|
1.四川师范大学计算机软件重点实验室，成都610068;2.河北北方学院物理系，张家口075000;3.中国工程物理研究院，绵阳621000
|
| 摘要: |
| 建立了一种计算Si(001)-(2*2*1):H表面O2 吸附的理论模型.
在周期性边界条件下，采用基于密度泛函理论广义梯度近似的超软
赝势法对Si(001)-(2*2*1):H表面O2吸附进行了第一性研究. 通过占
位能的计算，得到了Si(001)-(2*2*1):H表面O2的最佳吸附位置. 计
算结果表明吸附后的反应产物应为Si=O和H2O，从理论上支持了D.
Kovalev等人提出反应机制. |
| 关键词: Si(001)-(2*2*1):H，O2, 密度泛函理论，吸附位置 |
| DOI：10.1360/cjcp2006.19(6).485.3 |
| 分类号: |