Extremely non-equilibrium synthesis of luminescent zinc oxide nanoparticles through energetic ion condensation in a dense plasma focus device

Malhotra, Y., Roy, S., Srivastava, M.P., Kant, C.R., & Ostrikov, K. (2009) Extremely non-equilibrium synthesis of luminescent zinc oxide nanoparticles through energetic ion condensation in a dense plasma focus device. Journal of Physics D : Applied Physics, 42(15), pp. 155202-1.

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Abstract

Luminescent ZnO nanoparticles have been synthesized on silicon and quartz substrates under extremely non-equilibrium conditions of energetic ion condensation during the post-focus phase in a dense plasma focus (DPF) device. Ar+, O+, Zn+ and ZnO+ ions are generated as a result of interaction of hot and dense argon plasma focus with the surfaces of ZnO pellets placed at the anode. It is found that the sizes, structural and photoluminescence (PL) properties of the ZnO nanoparticles appear to be quite different on Si(1 0 0) and quartz substrates. The results of x-ray diffractometry and atomic force microscopy show that the ZnO nanoparticles are crystalline and range in size from 5-7 nm on Si(1 0 0) substrates to 10-38 nm on quartz substrates. Room-temperature PL studies reveal strong peaks related to excitonic bands and defects for the ZnO nanoparticles deposited on Si (1 0 0), whereas the excitonic bands are not excited in the quartz substrate case. Raman studies indicate the presence of E2 (high) mode for ZnO nanoparticles deposited on Si(1 0 0).

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ID Code: 73903
Item Type: Journal Article
Refereed: Yes
Additional URLs:
DOI: 10.1088/0022-3727/42/15/155202
ISSN: 0022-3727
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 14 Jul 2014 23:49
Last Modified: 16 Jul 2014 01:21

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