Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5350611 | Applied Surface Science | 2015 | 6 Pages |
Abstract
Nano-structures comprising of a pit surrounded by a circular ridge that resemble nano-donuts have been observed on flat terraces of both Au(1Â 1Â 1) and Al(1Â 0Â 0) surfaces after low energy (1.5-2Â keV) rare gas (rg) ion implantation. From time lapse scanning tunneling microscopy, we demonstrate that these donuts originate from the rg bubbles that migrate out from the sub-surface region. The circular shape of the donuts is observed for both Ar and Ne bubbles. The donuts and the related nano-structures represent different stages of large time scale co-operative relaxation of Au atoms by long range elastic interaction after the rg bubbles leave the metal.
Related Topics
Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Abhishek Rai, Jayita Nayak, Sudipta Roy Barman,