Open AccessSCANNING TUNNELING MICROSCOPY INVESTIGATION OF GOLD-ION BOMBARDMENT DAMAGES ON GRAPHITE SURFACE
Author(s) -
Jun Yan,
Bai Chuan-Yong,
Weiping Yang,
Yugang Wang,
Zhao Weijiang,
Fangzhou Yu,
Pengfei Zhai,
Tang Xiao-Wei
Publication year - 1993
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.42.1027
Subject(s) - hillock , scanning tunneling microscope , graphite , ion , materials science , atomic physics , nanotechnology , molecular physics , chemistry , physics , composite material , organic chemistry
In this work we investigate damages on graphite surface gercerated by bombardment with 530 KeV Au+ or 4.5 MeV Au++ at a dose of 1×1012 cm-2. The most significant damages are hillocks with a diameter around 1. 8 nm, as seen from our STM images. Very often they are surrounded by variable 31/2×31/2R30° superstructures of graphite, which die away within a distance of 1 to 3 nm. The density of the hillocks is in good agreement with the ion dose, indicating that they were induced by individual incident gold ions. Besides, in the STM images of higher magnifications there exist many smaller hillocks, which might be caused by the secondary ions or atoms.