STM study of selenium adsorption on Au(111) surface

doi:10.1088/1674-1056/ab821d

中国物理B ›› 2020, Vol. 29 ›› Issue (5): 56801-056801.doi: 10.1088/1674-1056/ab821d

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

STM study of selenium adsorption on Au(111) surface

Bin Liu(刘斌), Yuan Zhuang(庄源), Yande Que(阙炎德), Chaoqiang Xu(徐超强), Xudong Xiao(肖旭东)

Department of Physics, the Chinese University of Hong Kong, Shatin, Hong Kong, China

收稿日期:2020-02-20 修回日期:2020-03-12 出版日期:2020-05-05 发布日期:2020-05-05
通讯作者: Yande Que, Xudong Xiao E-mail:ydque@phy.cuhk.edu.hk;xdxiao@phy.cuhk.edu.hk
基金资助:
Project supported by the Direct Grant for Research of CUHK, China (Grant Nos. 4053306 and 4053348).

STM study of selenium adsorption on Au(111) surface

Bin Liu(刘斌), Yuan Zhuang(庄源), Yande Que(阙炎德), Chaoqiang Xu(徐超强), Xudong Xiao(肖旭东)

Department of Physics, the Chinese University of Hong Kong, Shatin, Hong Kong, China

Received:2020-02-20 Revised:2020-03-12 Online:2020-05-05 Published:2020-05-05
Contact: Yande Que, Xudong Xiao E-mail:ydque@phy.cuhk.edu.hk;xdxiao@phy.cuhk.edu.hk
Supported by:
Project supported by the Direct Grant for Research of CUHK, China (Grant Nos. 4053306 and 4053348).

摘要/Abstract

摘要： Adsorption of chalcogen atoms on metal surfaces has attracted increasing interest for both the fundamental research and industrial applications. Here, we report a systematic study of selenium (Se) adsorption on Au(111) at varies substrate temperatures by scanning tunneling microscopy. At room temperature, small Se clusters are randomly dispersed on the surface. Increasing the temperature up to 200℃, a well-ordered lattice of Se molecules consisting of 8 Se atoms in ring-like structure is formed. Further increasing the temperature to 250℃ gives rise to the formation of Se monolayer with Au(111)-√3×√3 lattices superimposed with a quasi-hexagonal lattice. Desorption of Se atoms rather than the reaction between the Se atoms and the Au substrate occurs if further increasing the temperature. The ordered structures of selenium monolayers could serve as templates for self-assemblies and our findings in this work might provide insightful guild for the epitaxial growth of the two-dimensional transition metal dichalcogenides.

关键词: STM, adsorption, selenium, structure transitions

Abstract: Adsorption of chalcogen atoms on metal surfaces has attracted increasing interest for both the fundamental research and industrial applications. Here, we report a systematic study of selenium (Se) adsorption on Au(111) at varies substrate temperatures by scanning tunneling microscopy. At room temperature, small Se clusters are randomly dispersed on the surface. Increasing the temperature up to 200℃, a well-ordered lattice of Se molecules consisting of 8 Se atoms in ring-like structure is formed. Further increasing the temperature to 250℃ gives rise to the formation of Se monolayer with Au(111)-√3×√3 lattices superimposed with a quasi-hexagonal lattice. Desorption of Se atoms rather than the reaction between the Se atoms and the Au substrate occurs if further increasing the temperature. The ordered structures of selenium monolayers could serve as templates for self-assemblies and our findings in this work might provide insightful guild for the epitaxial growth of the two-dimensional transition metal dichalcogenides.

Key words: STM, adsorption, selenium, structure transitions

中图分类号: (Scanning tunneling microscopy (including chemistry induced with STM))

68.37.Ef

68.43.-h (Chemisorption/physisorption: adsorbates on surfaces) 74.62.-c (Transition temperature variations, phase diagrams)

刘斌, 庄源, 阙炎德, 徐超强, 肖旭东. STM study of selenium adsorption on Au(111) surface[J]. 中国物理B, 2020, 29(5): 56801-056801.

Bin Liu(刘斌), Yuan Zhuang(庄源), Yande Que(阙炎德), Chaoqiang Xu(徐超强), Xudong Xiao(肖旭东). STM study of selenium adsorption on Au(111) surface[J]. Chin. Phys. B, 2020, 29(5): 56801-056801.

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STM study of selenium adsorption on Au(111) surface

STM study of selenium adsorption on Au(111) surface

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