On the formation of surface nanostructures induced by slow highly charged ions

Mourad Djebli, Amina Kiouche, Ayman El-Said, Hocine Bahlouli

Research output: Contribution to journalJournal articlepeer-review

5 Scopus citations

Abstract

Slow highly charged ions were successfully utilized for the creation of different types of surface structures. Hillock-like nanostructures were created in most of the investigated material surfaces. Here, we report on using the plasma expansion approach to explain the main features of the nanohillocks creation on the sapphire surface irradiated by slow highly charged ions. In order to explain the creation mechanism of hillocks, we used a two dimensional axisymmetric plasma expansion model, where the plasma parameters are correlated to the hillocks shape characteristics. Our strategy is based on following the expanding plasma front, assuming that the longitudinal and transverse initial conditions are different throughout the multi-fluid plasma model. The results show that the size of the ion-induced hillock is determined by the temperature and density ratios in the ion impact region.

Original languageEnglish
Article number072115
JournalPhysics of Plasmas
Volume24
Issue number7
DOIs
StatePublished - 1 Jul 2017

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