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物理学报. 2005, 54(4): 1513-1527.
doi: 10.7498/aps.54.1513.
局域功函数图像及其在Cu(111)-Au/Pd表面的应用
- 收稿日期: 2004-03-12
- 修回日期: 2004-12-07
- 刊出日期: 2005-02-05
English Abstract
Local work function measurement on Cu(111)-Au and Cu(111)-Pd surfaces
- Received Date:
12 March 2004
- Accepted Date:
07 December 2004
- Published Online:
05 February 2005
Abstract: In this paper, we report the local work function measurements on the Cu(111)-Au, and Cu(111)-Pd surfaces with scanning tunneling microscopy (STM). We successfully observed the local work function difference between the Au/Pd overlayer and the Cu substrate, the decreased work function at the step edges. We also found that the work function of the Pd film is larger than that of the bulk Pd(111). T he lower work function at step edges can be explained by the dipole moment forma tion. It is demonstrated that the local work function measurement by STM is a po werful way to identify different elements with nanometer resolution.
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Keywords:
- scanning tunneling microscope /
- local work function /
- step
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