Gas Effect On Plasma Dynamics Of Laser Ablation Zinc Oxide
- Advanced Technology Development Center Haouch-Oukil, B. P. 17, Baba Hassen (Algeria)
In order to synthesis zinc oxide thin films and nanostructures, laser ablation of ZnO target into both vacuum and oxygen atmosphere was performed. The gas effect on the plume dynamics was studied for O{sub 2} pressures varied between 10{sup -2} to 70 mbar. Plasma plume evolution was investigated by ICCD camera fast imaging. The plasma was created by a KrF excimer laser ({lambda} = 248 nm, {tau} = 25 ns) at a fluence of 2 J/cm{sup 2}. The light emitted by the plume was observed along the perpendicular to the ejection direction through a fast intensified charge-coupled device (ICCD). We have found that the plasma dynamics is very affected by the gas pressures. The photographs reveal the stratification of plasma into slow and fast components for 0.5 mbar O{sub 2} pressures and beyond. The photographs also show the apparition of hydrodynamic instabilities which are related to chemical reactions between the plasma and the surrounding gas for a certain range of pressures.
- OSTI ID:
- 21251415
- Journal Information:
- AIP Conference Proceedings, Vol. 1047, Issue 1; Conference: LAPAMS'08: 1. international conference on laser plasma applications in materials science, Algiers (Algeria), 23-26 Jun 2008; Other Information: DOI: 10.1063/1.2999975; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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