AN STM STUDY OF THE DEVELOPMENT OF SURFACE-FEATURES ON GOLD UNDER LOW-ENERGY HELIUM ION-BOMBARDMENT

Authors
DONNELLY SE VISHNYAKOV V TAYLOR D VALIZADEH R BALLARD IM GODDARD DT
Citation
Se. Donnelly et al., AN STM STUDY OF THE DEVELOPMENT OF SURFACE-FEATURES ON GOLD UNDER LOW-ENERGY HELIUM ION-BOMBARDMENT, Applied surface science, 74(1), 1994, pp. 81-90
Citations number
17
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical","Materials Science, Coatings & Films
Journal title
Applied surface science → ACNP
ISSN journal
01694332
Volume
74
Issue
1
Year of publication
1994
Pages
81 - 90
Database
ISI
SICI code
0169-4332(1994)74:1<81:ASSOTD>2.0.ZU;2-V
Abstract
The development of small-scale surface topography on initially atomica lly flat gold surfaces under irradiation with 3 keV helium ions has be en investigated using a scanning tunnelling microscope (STM). The stud y has revealed surface features that appear to result from the underly ing defect morphology in the implanted metal rather than from sputter- erosion processes occurring at the surface. These features are stable at room temperature. Smaller, sub-monolayer height ''bumps'' have also been observed under some conditions. It is postulated that these feat ures may be an electronic rather than an elastic effect.