SURFACE MODIFICATION AND ATOMIC RESOLUTION ON A VACUUM-ANNEALED GOLD FOIL IN AIR BY SCANNING TUNNELING MICROSCOPY

被引：15
|
作者：
HOFFMANNMILLACK, B
ROBERTS, CJ
STEER, WS
机构：
[1] Blackett Laboratory, Imperial College
来源：
JOURNAL OF APPLIED PHYSICS | 1990年 / 67卷 / 04期
关键词：
D O I：
10.1063/1.345598
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Scanning tunneling microscopy has been used to investigate changes in a vacuum-annealed gold surface induced by the application of voltage pulses to the tip. After a 2-V 1.5-s pulse a hole several hundreds of angstroms wide and of similar depth was generated, the responsibility being ascribed to ion arcing. We present a time-lapse sequence showing its decay process, from which surface-diffusion velocities between 4 and 0.1 Å s-1 have been determined. From the new surface, a scan showing atomic resolution has been obtained, giving different interatomic spacings (S) and atomic diameters (D) in two lattice directions at an angle of 60°. These are S=2.1 Å and D=2.0 Å for the short axis and S=3.1 and 3.8 Å and D=2.7 Å for the long axis.
引用
收藏
页码：1749 / 1752
页数：4
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