Abstract：
:The self-organisation of void and gas bubbles in solids into superlattices is an intriguing nanoscale phenomenon. Despite the discovery of these lattices 45 years ago, the atomistics behind the ordering mechanisms responsible for the formation of these nanostructures are yet to be fully elucidated. Here we report on the direct observation via transmission electron microscopy of the formation of bubble lattices under He ion bombardment. By careful control of the irradiation conditions, it has been possible to engineer the bubble size and spacing of the superlattice leading to important conclusions about the significance of vacancy supply in determining the physical characteristics of the system. Furthermore, no bubble lattice alignment was observed in the <111> directions pointing to a key driving mechanism for the formation of these ordered nanostructures being the two-dimensional diffusion of self-interstitial atoms.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Harrison RW,Greaves G,Hinks JA,Donnelly SEdoi
10.1038/s41598-017-07711-wsubject
Has Abstractpub_date
2017-08-10 00:00:00pages
7724issue
1issn
2045-2322pii
10.1038/s41598-017-07711-wjournal_volume
7pub_type
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