Ion impact distribution over plasma exposed nanocone arrays

Mehrabian, S., Xu, S., Qaemi, A.A., Shokri, B., & Ostrikov, K. (2013) Ion impact distribution over plasma exposed nanocone arrays. Physics of Plasmas, 20(3), 033501.

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The effect of an ordered array of nanocones on a conducting substrate immersed in the plasma on the transport of the plasma ions is investigated. The real conical shape of the cones is rigorously incorporated into the model. The movement of 10^5 CH3+ ions in the plasma sheath modified by the nanocone array is simulated. The ions are driven by the electric fields produced by the sheath and the nanostructures. The surface charge density and the total charge on the nanotips with different aspect ratios are computed. The ion transport simulation provides important characteristics of the displacement and velocity of the ions. The relative ion distribution along the lateral surfaces of the carbon nanotips is computed as well. It is shown that a rigorous account of the realistic nanostructure shape leads to very different distribution of the ion fluxes on the nanostructured surfaces compared to the previously reported works. The ion flux distribution is a critical factor in the nucleation process on the substrate and determines the nanostructure growth patterns.

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3 citations in Scopus
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3 citations in Web of Science®

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ID Code: 73565
Item Type: Journal Article
Refereed: Yes
DOI: 10.1063/1.4794327
ISSN: 1070-664X
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 09 Jul 2014 01:05
Last Modified: 10 Jul 2014 01:35

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