Abstract
Laser ablation of solid targets for the preparation of thin films of ceramic materials has yielded important results and is considered a very promising technique. Recently we have performed some laser ablation experiments with the aim of understanding the chemical reactivity of the neutral and charged species produced under the laser action. The irradiation and the mass spectrometric analysis of composite solid targets made from oxides and graphite will be presented here. The Lamma technique has been employed to produce and analyze cluster ions formed from graphite and Y 2O 3, La 2O 3 and Sc 2O 3 mixtures. Reduction processes leading to Me n C + m ions in a range of n = 1−7 and m = 1−13 occur in the plasma produced by the laser as recorded by mass spectrometry. Formation of carbide cluster ions is predominant with respect to the growth of oxide or carbon ion clusters.
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