Thermodynamical and plasma-driven kinetic growth of high-aspect-ratio nanostructures : effect of hydrogen termination

Levchenko, I., Ostrikov, K., & Xu, S. (2009) Thermodynamical and plasma-driven kinetic growth of high-aspect-ratio nanostructures : effect of hydrogen termination. Journal of Physics D : Applied Physics, 42(12), pp. 125207-1.

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The results of studies on the growth of high-aspect nanostructures in low-temperature non-equilibrium plasmas of reactive gas mixtures with or without hydrogen are presented. The results suggest that the hydrogen in the reactive plasma strongly affects the length of the nanostructures. This phenomenon is explained in terms of selective hydrogen passivation of the lateral and top surfaces of the surface-supported nanostructures. The theoretical model describes the effect of the atomic hydrogen passivation on the nanostructure shape and predicts the critical hydrogen coverage of the lateral surfaces necessary to achieve the nanostructure growth with the pre-determined shape. Our results demonstrate that the use of a strongly non-equilibrium plasma is very effective in significantly improving the shape control of quasi-one-dimensional single-crystalline nanostructures.

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ID Code: 73902
Item Type: Journal Article
Refereed: Yes
Additional URLs:
DOI: 10.1088/0022-3727/42/12/125207
ISSN: 0022-3727
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 14 Jul 2014 23:44
Last Modified: 16 Jul 2014 01:32

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