| Adsorption of L-Alanine on Cu（111） Studied by Scanning Tunnelling Microscopy |
| |
| 引用本文： | GE Si-Ping,Lü Chao,ZHAO Ru-Guang. Adsorption of L-Alanine on Cu（111） Studied by Scanning Tunnelling Microscopy[J]. 中国物理快报, 2006, 23(6): 1558-1561 |
| |
| 作者姓名： | GE Si-Ping Lü Chao ZHAO Ru-Guang |
| |
| 作者单位： | [1]Key Laboratory on the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871 [2]State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871 |
| |
| 基金项目： | Supported by the National Basic Research Programme of China under Grant Nos 001CB610502 and 001CB610504, the National High Technology Development Program of China under Grant No 2004AA302Gll, the National Natural Science Foundation of China under Grant No 60271004, and the Key Project and the Program for New Century Excellent Talents in University of the Ministry of Education of China. 0ne of the authors （Ge Siping） wishes to thank Professor Q. Chen for her generous assistance. |
| |
| 摘 要： | The adsorption of L-alanine on Cu（111） surface is studied by means of scanning tunnelling microscopy under ultra-high vacuum conditions. The results show that the adsorbates are chemisorbed on the surface, and can form a two-dimensional gas phase, chain phase and solid phase, depending on deposition rate and amount. The adsorbed molecules can be imaged as individual protrusions and parallel chains in gas and chain phases respectively. It is also found that alanine can form （2 × 2） superstructure on Cu（111） and copper step facet to （110） directions in solid phase. On the basis of our scanning tunnelling microscopic images, a model is proposed for the Cu（111）（2 ×2）-alanine superstructure. In the model, we point out the close link between （110）-direction hydrogen bond chains with the same direction copper step faceting.
|
| 关 键 词： | 吸附作用 L-丙胺酸 扫描隧道效应显微术 真空情形 |
| 收稿时间： | 2006-02-17 |
| 修稿时间： | 2006-02-17 |
Adsorption of L-Alanine on Cu(111) Studied by Scanning Tunnelling Microscopy |
| |
| Ge SiPing;Lv Chao;Zhao RuGuang. Adsorption of L-Alanine on Cu(111) Studied by Scanning Tunnelling Microscopy[J]. Chinese Physics Letters, 2006, 23(6): 1558-1561 |
| |
| Authors: | Ge SiPing Lv Chao Zhao RuGuang |
| |
| Affiliation: | Key Laboratory on the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871 |
| |
| Abstract: | The adsorption of L-alanine on Cu(111) surface is studied by means of scanning tunnelling microscopy under ultra-high vacuum conditions. The results show that the adsorbates are chemisorbed on the surface, and can form a two-dimensional gas phase, chain phase and solid phase, depending on deposition rate and amount. The adsorbed molecules can be imaged as individual protrusions and parallel chains in gas and chain phases respectively. It is also found that alanine can form (2×2) superstructure on Cu(111) and copper step facet to <110> directions in solid phase. On the basis of our scanning tunnelling microscopic images, a model is proposed for the Cu(111)(2×2)-alanine superstructure. In the model, we point out the close link between $langle 110rangle$-direction hydrogen bond chains with the same direction copper step faceting. |
| |
| Keywords: | 68.37.Ef 68.43.Fg |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《中国物理快报》浏览原始摘要信息 |
|
点击此处可从《中国物理快报》下载免费的PDF全文 |
